“I know you don’t trust him, but you can. I do. Cam’s darkness is legendary, but it is only a sliver of his personality.”

  “But then why would he side with Lucifer? Why would any of the angels?”

  “Cam didn’t,” Daniel said. “Not at first, anyway. It was a very unstable time. Unprecedented. Unimaginable. At the time of the Fall, there were some angels who sided with Lucifer right away, but there were others, like Cam, who were cast out by the Throne for not choosing quickly enough. The rest of history has been a slow choosing of sides, with angels returning to the fold of Heaven or the ranks of Hell until there are only a few unallied fallen left.”

  “That’s where we are now?” Luce asked, even though she knew that Daniel didn’t like to talk about how he still had not chosen a side.

  “You used to really like Cam,” Daniel said, sliding the subject away from himself. “For a handful of lifetimes on Earth the three of us were very close. It was only much later, after Cam had suffered a broken heart, that he crossed over to Lucifer’s side.”

  “What? Who was she?”

  “None of us like to talk about her. You must never let on that you know,” Daniel said. “I resented his choice, but I can’t say I didn’t understand it. If I ever truly lost you, I don’t know what I would do. My whole world would dim.”

  “That isn’t going to happen,” Luce said too quickly. She knew this lifetime was her last chance. If she died now, she would not come back.

  She had a thousand questions, about the woman Cam had lost, about the strange quake in Daniel’s voice when he talked about Lucifer’s appeal, about where she’d been when he was falling. But her eyelids felt heavy, her body slack with fatigue.

  “Rest,” Daniel cooed in her ear. “I’ll wake you up when we’re landing in Venice.”

  It was all the permission she needed to let herself drift off. She closed her eyes against the phosphorescent waves crashing thousands of feet below and flew into a world of dreams where nine days had no significance, where she could dip and soar and linger in the glory of the clouds, where she could fly freely, into infinity, without the slightest chance of falling.

  THREE

  THE SUNKEN SANCTUARY

  Daniel had been knocking on the weathered wooden door in the middle of the night for what felt to Luce like half an hour. The three-story Venetian town house belonged to a colleague, a professor, and Daniel was certain this man would let them crash, because they had been great friends “years ago,” which, with Daniel, could encompass quite a span of time.

  “He must be a heavy sleeper.” Luce yawned, half lulled back into sleep herself by the steady pounding of Daniel’s fists. Either that, she thought blearily, or the professor was sitting in some bohemian all-night café, sipping wine over a book crammed with incomprehensible terms.

  It was three in the morning—their touchdown amid the silvery web of Venice’s canals had been accompanied by the chiming of a clock tower somewhere in the darkened distance of the city—and Luce was overcome with fatigue. She leaned miserably against the cold tin mailbox, causing it to wobble loose from one of the nails holding it upright. This sent the whole box slanting, making Luce stumble backward and nearly hurtle into the murky black-green canal, whose water lapped over the lip of the mossy stoop like an inky tongue.

  The whole exterior of the house seemed to be rotting in layers: from the painted blue wood peeling off the windowsills in slimy sheets, to red bricks crawling with dark green mold, to the damp cement of the stoop, which crumbled under their feet. For a moment, Luce thought she could actually feel the city sinking.

  “He’s got to be here,” Daniel muttered, still pounding.

  When they’d landed on the canal-side ledge usually accessed only by gondola, Daniel had promised Luce a bed inside, a hot drink, a reprise from the damp and bracing wind they’d been flying through for hours.

  At last, the slow shuffling of feet thumping down stairs inside perked a shivering Luce to attention. Daniel exhaled and closed his eyes, relieved, as the brass knob turned. Hinges moaned as the door swung open.

  “Who the devil—” The older Italian man’s wiry tufts of white hair stood out at all angles from his head. He had sensationally bushy white eyebrows, a mustache to match, and thick white chest hair protruding from the V-neck of his dark gray robe.

  Luce watched Daniel blink in surprise, as if he was second-guessing their address. Then the old man’s pale brown eyes lit up. He lurched forward, pulling Daniel into a tight embrace.

  “I was beginning to wonder if you were going to visit before I kicked the inevitable bucket,” the man whispered hoarsely. His eyes traveled to Luce, and he smiled as if they hadn’t woken him, as if he’d been expecting them for months. “After all these years, you finally brought over Lucinda. What a treat.”

  His name was Professor Mazotta. He and Daniel had studied history together at the University of Bologna in the thirties. He was not appalled or bewildered by Daniel’s lack of aging: Mazotta understood what Daniel was. He seemed to feel only joy at being reunited with an old friend, a joy that was augmented by the introduction to the love of that friend’s life.

  He escorted them into his office, which was also a study of varying degrees of decay. His bookshelves dipped at their centers; his desk was piled with yellowing papers; the rug was worn to threads and splashed with coffee stains. Mazotta set immediately to making each of them a cup of dense hot chocolate—an old man’s old bad habit, he rasped to Luce with a nudge. But Daniel barely took a sip before thrusting his book into Mazotta’s hands and opening it to the description of the first relic.

  Mazotta slipped on thin wire-framed glasses and squinted at the page, mumbling to himself in Italian. He stood up, walked to the bookshelf, scratched his head, turned back to the desk, paced the office, sipped his chocolate, then returned to the bookshelf to pull out a fat leather-bound tome. Luce stifled a yawn. Her eyelids felt like they were working hard to hold up something heavy. She was trying not to drift, pinching the inside of her palm to keep herself awake. But Daniel’s and Professor Mazotta’s voices met each other like distant clouds of fog as they argued over the impossibility of everything the other was saying.

  “It’s absolutely not a windowpane from the church of Saint Ignatius.” Mazotta wrung his hands. “Those are slightly hexagonal, and this illustration is resoundingly oblong.”

  “What are we doing here?” Daniel suddenly shouted, rattling an amateur painting of a blue sailboat on the wall. “We clearly need to be at the library at Bologna. Do you still have keys to get in? In your office you must have had—”

  “I became emeritus thirteen years ago, Daniel. And we’re not traveling two hundred kilometers in the middle of the night to look at …” He paused. “Look at Lucinda, she’s sleeping standing up, like a horse!”

  Luce grimaced groggily. She was afraid to start down the path of a dream for fear she might meet Bill. He had a tendency to turn up when she closed her eyes these days. She wanted to stay awake, to stay away from him, to be a part of the conversation about the relic she and Daniel would need to find the next day. But sleep was insistent and would not be denied.

  Seconds or hours later, Daniel’s arms lifted her from the ground and carried her up a dark and narrow flight of stairs.

  “I’m sorry, Luce,” she thought he said. She was too deep asleep to respond. “I should have let you rest sooner. I’m just so scared,” he whispered. “Scared we’re going to run out of time.”

  Luce blinked and shifted backward, surprised to find herself in a bed, further surprised by the single white peony in a short glass vase drooping onto the pillow next to her head.

  She plucked the flower from its vase and twirled it in her palm, causing drops of water to bead on the brocaded rose duvet. The bed creaked as she propped the pillow up against the brass headboard to look around the room.

  For a moment, she felt disoriented by finding herself in an unfamiliar place, dreamed memories of traveling through the Announcers slowly fading as she fully awoke. She no longer had Bill to give her clues about where she’d ended up. He was only there in her dreams, and the previous night he’d been Lucifer, a monster, laughing at the idea that she and Daniel could change or stop a thing.

  A white envelope was propped against the vase on the nightstand.

  Daniel.

  She remembered only a single soft sweet kiss and his arms pulling away as he’d tucked her into bed the previous night and shut the door.

  Where had he gone after that?

  She ripped open the envelope and slid out the stiff white card it held. On the card were three words:

  On the balcony.

  Smiling, Luce threw back the covers and heaved her legs over the side of the bed. She padded across the giant woven rug, the white peony scissored between her fingers. The windows in the bedroom were tall and narrow and rose nearly twenty feet to the cathedral ceiling. Behind one of the rich brown curtains was a glass door leading out to a terrace. She turned the metal latch and stepped outside, expecting to find Daniel and sink into his arms.

  But the crescent-moon-shaped terrace was empty. Just a short stone railing and a one-story drop to the green waters of the canal, and a small glass-topped table with a red canvas folding chair beside it. The morning was beautiful. The air smelled murky but crisp. On the river shiny narrow black gondolas glided past one another as elegantly as swans. A pair of speckled thrushes chirped from a clothesline one floor up, and on the other side of the canal was a row of cramped pastel apartments. It was charming, sure, the Venice of most people’s dreams, but Luce wasn’t here to be a tourist. She and Daniel were here to save their history, and the world’s. And the clock was ticking. And Daniel was gone.

  Then she noticed a second white envelope on the balcony table, propped up against a tiny white to-go cup and a small paper bag. Again, she tore open the card, and again found only three words:

  Please wait here.

  “Annoying yet romantic,” she said aloud. She sat down on the folding chair and peered inside the paper bag. A handful of tiny jam-filled donuts dusted with cinnamon and sugar sent up an intoxicating scent. The bag was warm in her hands, flecked with little bits of oil seeping through. Luce popped one into her mouth and took a sip from the tiny white cup, which contained the richest, most delightful espresso Luce had ever tasted.

  “Enjoying the bombolini?” Daniel called from below.

  Luce shot to her feet and leaned over the railing to find him standing at the back of a gondola painted with images of angels. He wore a flat straw hat bound with a thick red ribbon, and used a broad wooden paddle to steer the boat slowly toward her.

  Her heart surged the way it did each time she first saw Daniel in another life. But he was here. He was hers. This was happening now.

  “Dip them in the espresso, then tell me what it’s like to be in Heaven,” Daniel said, smiling up at her.

  “How do I get down to you?” she called.

  He pointed to the narrowest spiral staircase Luce had ever seen, just to the right of the railing. She grabbed the coffee and bag of donuts, slipped the peony stem behind her ear, and made for the steps.

  She could feel Daniel’s eyes on her as she climbed over the railing and slinked down the stairs. Every time she made a full rotation on the staircase, she caught a teasing flash of his violet eyes. By the time she made it to the bottom, he had extended his hand to help her onto the boat.

  There was the electricity she’d been yearning for since she awoke. The spark that passed between them every time they touched. Daniel wrapped his arms around her waist and drew her in so that there was no space between their bodies. He kissed her, long and deep, until she was dizzy.

  “Now that’s the way to start a morning.” Daniel’s fingers traced the petals of the peony behind her ear.

  A slight weight suddenly tugged at her neck and when she reached up, her hands found a fine chain, which her fingers traced down to a silver locket. She held it out and looked at the red rose engraved on its face.

  Her locket! It was the one Daniel had given to her on her last night at Sword & Cross. She had kept it tucked in the front cover of The Book of the Watchers during the short time she’d spent alone in the cabin, but everything about those days was blurry. The next thing she remembered was Mr. Cole rushing her to the airport to catch her flight to California. She hadn’t remembered the locket or the book until she’d arrived at Shoreline, and by then she was certain she’d lost them.

  Daniel must have slipped it around her neck when she was sleeping. Her eyes teared again, this time with happiness. “Where did you—”

  “Open it.” Daniel smiled.

  The last time she’d held the locket, the image of a former Luce and Daniel had baffled her. Daniel said he’d tell her when the photograph had been taken the next time he saw her. That hadn’t happened. Their stolen time together in California had been mostly stressful and too brief, filled with silly arguments she couldn’t imagine having with Daniel anymore.

  Luce was glad to have waited, because when she opened the locket this time and saw the tiny photograph behind its glass plate—Daniel in a bowtie and Luce with coiffed short hair—she instantly recognized what it was.

  “Lucia,” she whispered. It was the young nurse Luce had encountered when she stepped through into World War I Milan. The girl had been much younger when Luce met her, sweet and a little sassy, but so genuine Luce had admired her right away.

  She smiled now, remembering the way Lucia kept staring at Luce’s shorter modern haircut, and the way Lucia joked that all the soldiers had a crush on Luce. She remembered mostly that if Luce had stayed at the Italian hospital a little longer and if the circumstances had been … well, entirely different, the two of them could have been great friends.

  She looked up at Daniel, beaming, but her expression quickly darkened. He was staring at her as if he’d been punched.

  “What’s wrong?” She let go of the locket and stepped into him, wrapping her arms around his neck.

  He shook his head, stunned. “I’m just not used to being able to share this with you. The look on your face when you recognized that picture? It’s the most beautiful thing I’ve ever seen.”

  Luce blushed and smiled and felt speechless and wanted to cry all at once. She understood Daniel completely.

  “I’m sorry I left you alone like that,” he said. “I had to go and check something in one of Mazotta’s books in Bologna. I figured you’d need every bit of rest you could get, and you looked so beautiful asleep, I couldn’t bear to wake you up.”

  “Did you find what you were looking for?” Luce asked.

  “Possibly. Mazotta gave me a clue about one of the piazzas here in town. He’s mostly an art historian, but he knows his divinity better than any mortal I’ve ever met.”

  Luce slid down to the gondola’s low red velvet bench, which was like a love seat, with a padded black leather cushion and a high, sculpted back.

  Daniel sank the oar into the water and the boat slid forward. The water was a bright pastel green, and as they glided, Luce could see the whole city reflected in the glassy wobble of its surface.

  “The good news,” Daniel said, looking down at her from under the brim of his hat, “is that Mazotta thinks he knows where the artifact is located. I kept him up bickering until sunrise, but we finally matched my sketch to an interesting old photograph.”

  “And?”

  “As it turns out”—Daniel flicked his wrist and the gondola curved gracefully around a tight corner, then dipped under the low slant of a footbridge—“the serving tray is a halo.”

  “A halo? I thought only angels on greeting cards had halos.” She cocked her head at Daniel. “Do you have a halo?”

  Daniel smiled as if he found the question charming. “Not in the golden-ring fashion, I don’t think. As far as we can tell, halos are representations of our light, in a way that mortals can comprehend. The violet light you saw around me at Sword & Cross, for example. I’m guessing Gabbe never told you stories about posing for da Vinci?”

  “She did what?” Luce almost choked on her bombolini.

  “He didn’t know she was an angel, of course, but according to her, Leonardo talked about the light that seemed to radiate from within her. That’s why he painted her with a halo circling her head.”

  “Whoa.” Luce shook her head, astonished, as they glided past a pair of lovers in matching felt fedoras kissing in a balcony corner.

  “It’s not just him. Artists have been depicting angels that way since we first fell to Earth.”

  “And the halo we need to find today?”

  “Another artist’s depiction.” Daniel’s face grew somber. The brass of a scratchy jazz record drifted out an open window and seemed to fill the space around the gondola, scoring Daniel’s narration. “This one is a sculpture of an angel, and much older, from the pre-classical era. So old, the artist’s identity is unknown. It’s from Anatolia and, like the rest of these artifacts, was stolen during the Second Crusade.”

  “So we just go find the sculpture in a church or museum or whatever, lift the halo off the angel’s head, and sprint to Mount Sinai?” Luce asked.

  Daniel’s eyes darkened for a split second. “For now, yes, that’s the plan.”

  “That sounds too simple,” Luce said, noting the intricacies of the buildings around her—the high onion-domed windows in one, the verdant herb garden creeping out the window of another. Everything seemed to be sinking into the bright green water with a kind of serene surrender.

  Daniel stared past her, the sunlit water reflecting in his eyes. “We’ll see how simple it is.”

  He squinted at a wooden sign farther down the block, then steered them out of the center of the canal. The gondola rocked as Daniel guided it to a stop against a brick wall crawling with vines. He grabbed hold of one of the mooring poles and knotted the gondola’s rope around it. The boat groaned and strained against its bindings.