The Sixth Tenant

Chapter 1: The Last Message

The text arrived at 2:14 in the morning, London time.

Felicity Marlow was awake, as she often was at that hour, sitting cross-legged on her unmade bed in the Clapham flat she could barely afford, scrolling through job listings she had no intention of applying to. The screen of her phone lit up with Niall's name, and she felt the familiar mix of affection and low-grade worry that her younger brother had been provoking in her since he was old enough to climb things he shouldn't.

The message read: *Something wrong here. Not what I thought. Don't trust the house.*

She stared at it. Then she typed back: *What do you mean? What house? Are you okay?*

Three dots appeared. Disappeared. Appeared again.

Then nothing.

She tried calling. It rang five times and went to voicemail—Niall's cheerful recorded voice, the one he'd put on when he first moved to Amsterdam six months ago, full of optimism about the gallery job, the canal house apartment, the new chapter. "You've reached Niall Marlow. Leave a message or don't, I'm probably looking at something beautiful."

"Niall, it's me. Call me back. I mean it."

She set the phone on her pillow and lay down beside it, watching the screen as if willpower alone could make it light up again. Eventually she dozed, and when she woke at six, there was nothing new.

That had been four days ago.

In the days since, she'd received two more texts from him—both at odd hours, both unsettling. The first said: *I found something I shouldn't have. I think they know.* The second, which came just twelve hours before she booked her flight, said simply: *If I go quiet, come find me.*

After that, silence. His phone went straight to voicemail. No more three dots. No more anything.

Felicity was not, by nature, a person who acted decisively. She was thirty-one years old and had spent the better part of a decade drifting between temporary jobs, half-finished courses, and relationships that fizzled before they caught fire. Her mother described her as "still finding herself," which was a kind way of saying she was lost. Niall, four years younger and infinitely more focused, had always been the one with direction. He'd studied art history, landed a position at a small but respected gallery in Amsterdam's Jordaan district, and moved abroad with the kind of quiet confidence Felicity admired and envied in equal measure.

But something had shifted in the past few weeks. His texts had grown shorter, stranger. He'd cancelled two video calls at the last minute. When they did speak, his voice had a thinness to it, a vibration she recognized from childhood—the sound Niall made when he was frightened but trying not to show it.

So she booked a flight. She packed a bag with five days' worth of clothes, told her landlord she'd be away, and caught the 7:15 from Gatwick to Schiphol on a grey Tuesday morning in late October.

The plane was half empty. She sat by the window and watched England fall away beneath a shelf of cloud, replaced eventually by the flat green geometry of the Netherlands, its canals catching light like scratches on glass. She tried Niall's phone again from the departure gate and again from the arrivals hall. Voicemail both times.

The train from Schiphol to Amsterdam Centraal took seventeen minutes. She stood the entire way, gripping the overhead rail, her carry-on bag between her feet. The carriage smelled of rain and coffee. Around her, commuters scrolled their phones with the glazed contentment of people whose brothers were not missing.

At Centraal, she emerged into the wide grey sprawl of the station plaza and oriented herself with Google Maps. Niall's apartment was on the Keizersgracht, one of the main canal rings, about a twenty-minute walk south. She could have taken a tram, but she wanted to move, wanted the rhythm of her own footsteps to keep the panic at manageable levels.

Amsterdam in October was beautiful in a bruised sort of way. The trees along the canals had turned amber and rust, their leaves drifting onto the dark water. Bicycles streamed past in both directions, their riders bundled in scarves and wool coats. The houseboats sat low and patient at their moorings. Everything was postcard-pretty, and Felicity hated it a little for that—for being serene when her stomach was in knots.

She found the address: Keizersgracht 412. It was a narrow canal house, four stories tall, with a stepped gable roof and dark brick that had aged to the color of dried blood. The front door was painted a deep green, slightly chipped, with a brass knocker shaped like a lion's head. To the left of the door, a vertical column of buzzers corresponded to the building's six apartments. Niall was in number four, third floor.

She pressed the buzzer. Waited. Pressed it again.

A voice crackled through the intercom—female, French-accented. "Yes?"

"I'm looking for Niall Marlow. Apartment four. I'm his sister."

A pause. Then: "One moment."

The door buzzed open. Felicity pushed through into a narrow vestibule with black-and-white tile flooring and a row of mailboxes on the left wall. The air smelled of old wood and something faintly chemical—cleaning fluid, maybe, or paint. A staircase rose steeply ahead of her, the kind of near-vertical Dutch staircase that felt more like a ladder than proper stairs.

A woman appeared from a door at the back of the vestibule. She was perhaps fifty, trim and precise, with silver-streaked dark hair pulled into a low bun. She wore a grey cashmere cardigan over a white blouse, and her expression was carefully neutral.

"I am Yvette Bonnard," she said. "The concierge. You are Niall's sister?"

"Felicity. Yes. Is he here?"

Yvette's mouth tightened almost imperceptibly. "I'm afraid not. He left several days ago. With a suitcase. I assumed he was traveling."

"Left? Left where?"

"I don't know. I saw him in the vestibule, early morning. He had his suitcase and his coat. He didn't say where he was going."

Felicity felt the floor shift slightly beneath her, the way it does when information arrives that your body understands before your mind does. "He hasn't been answering his phone. For days."

"Perhaps he wanted some time away. Young people do that."

"His texts were—" Felicity stopped herself. She didn't know this woman. She didn't know what Niall would want her to share. "Can I see his apartment? I have a key." This was a lie. She didn't have a key.

Yvette studied her for a moment. "I can let you in. If you are his sister, I see no harm."

She produced a ring of keys from her cardigan pocket—she seemed like the sort of woman who always had keys at the ready—and led Felicity up the steep stairs. The building creaked with every step, the wood worn smooth and concave in the center of each tread. On the second-floor landing, a door was closed, and behind it Felicity could hear the faint sound of music—something orchestral, played low.

They continued up to the third floor. Yvette stopped at a door marked with a small brass 4 and fitted a key into the lock. It turned easily.

"It was already unlocked," Yvette said, frowning slightly. "He must not have locked it when he left."

She pushed the door open and stepped aside.

Felicity walked in.

The apartment was small—a single main room that served as both living space and bedroom, with a kitchenette along one wall and a door that presumably led to a bathroom. The ceiling was low, crossed with dark wooden beams. A window looked out onto the canal, and through it Felicity could see the water, the trees, a cyclist passing on the opposite bank.

Niall's things were everywhere. His books were stacked on the windowsill—art history texts, a Dutch phrasebook, a dog-eared copy of a John le Carré novel. His laptop sat open on the small desk, its screen dark. Clothes hung in the open wardrobe. A coffee mug sat on the bedside table, a brown ring dried at the bottom.

And in the bedside drawer, which Felicity opened with a hand that had begun to tremble, she found his passport.

She held it up. The burgundy cover, the gold embossing. She flipped it open to his photo—Niall at twenty-three, looking slightly startled, as everyone does in passport photos. She turned to Yvette, who was standing in the doorway.

"You said he left with a suitcase."

"That's right."

"His passport is here."

Yvette's expression didn't change, but something shifted behind her eyes—a flicker of something that might have been concern or might have been calculation. "Perhaps he was traveling domestically. Within the EU, he wouldn't need—"

"He's British. Post-Brexit. He needs his passport to go anywhere in Europe."

A silence settled between them. Yvette smoothed the front of her cardigan.

"I can only tell you what I saw," she said. "He left with a suitcase. That is all I know."

She excused herself and went back downstairs. Felicity stood alone in her brother's apartment, holding his passport, listening to the building settle around her. The floorboards groaned. Somewhere above, a pipe clanked. The canal house was old and alive with small sounds, the way old buildings are—as if the walls themselves were breathing.

She sat on the edge of Niall's bed and tried his phone one more time. Straight to voicemail.

"Niall," she said. "I'm in your apartment. I'm in Amsterdam. Your passport is here and you're not. I'm not leaving until I find you."

She ended the call and looked around the room. The coffee mug. The open laptop. The unmade bed. Everything suggested a person who had stepped out and would be right back. Nothing suggested a person who had packed a suitcase and left.

Felicity set her own bag on the floor, took off her coat, and hung it on the hook behind the door, next to Niall's denim jacket.

She was staying.