Chapter 1

Laro's arm was cold when she caught it.

Not sea-cold. Not the flat, honest cold of October wind on wet skin. This was deeper. A cold that had direction. It moved through him toward the water, and for the instant her hand closed over his sleeve, the thing beneath the surface opened and came through them both.

Hum in bone. Depth in the sternum. The pressure of black water where no light had ever lived. Laro's pulse and the Greyling's pulse and her own, all striking once in the same place.

She pulled.

His body came back with her. His feet dragged on the shale. His breath hitched. His eyes found her face and did not know it.

After, he sat at the lighthouse table with both hands around a cup of tea gone cold. His breathing was wrong. Too slow. Too far apart. As if he had learned another rhythm and could not remember which one belonged to air.

By morning it had almost passed. By evening he spoke. By the third day he slept. By the seventh he walked down to the eastern shore before dawn, barefoot on stone silvered with frost, and the sea took him without a sound.

When she reached the water there was only the flat grey surface, still as worked glass.

Nothing in it.

The hum had not stopped.

The water was in the walls again.

Nael stood in the dark kitchen of the Mór lighthouse with her palm against the inner stone and felt the cold come through. The walls were never wet. The lighthouse stood too high for that, built on basalt above the eastern cliff where the Sunder rose nearest the surface. But the stone carried the sea upward all the same. In autumn it hummed with it.

Now, in the first thin weeks after surfacing season, the hum was faint. A memory more than a presence. A pressure that lived below hearing and above touch, landing instead behind her ribs.

The fire had gone out. Grey ash. A drift of salt on the windowsill where the wind had found its way through. Outside, the dark had the dense, waiting quality of the hour before dawn, though it was still night. The sea below the cliff moved without sound she could hear from here. She knew its shape anyway. The notch in the black rock where the eastern shore curved inward. The line of shale at low tide. The place where her mother had walked in.

She took her hand from the wall. The cold stayed in her palm.

On the table lay what she was taking: one change of clothes, rolled tight; her father's knife in its worn leather sheath; a coil of rope; two hard rounds of bread wrapped in cloth. Not enough for a life. Enough for leaving.

She had provisioned Sael over six nights, one quiet trip at a time from the lighthouse down to the harbor cove. Fresh water in sealed casks. Dried fish. Oats. Oil for the lamp. No one had seen. Or if they had, they had said nothing. The Harrows had a way of letting a silence stand when breaking it would make the thing inside it real.

She put the knife in her bag. Coiled the rope over her shoulder. Blew on her fingers once, not for warmth, only to feel breath leave her body and come back to her face.

Then she went downstairs.

The lighthouse stairs held the night's cold the way bone holds old pain. Her boots knew each tread. She did not need the lamp. At the foot of the tower she paused with her hand on the door latch and felt, through wood and iron and stone, the faintest pulse from the deep.

Still here.

She opened the door.

The wind took the heat from her face at once. Salt, peat, kelp gone rank in the cracks of the shore below. Mór lay around her in its familiar dark: the low hump of grass bent flat by weather, the black glisten of basalt, the path worn into the ground by generations of feet moving between tower and cove. Beyond it, to the west, Tharn was only a larger shadow against the lesser dark of the sky. Vesk was hidden behind it. The uninhabited stacks farther out were nothing at all.

She closed the door behind her and began the walk down.

The path was slick. In places the rock showed through the peat, black and worn smooth. She moved by balance more than sight, one hand free, the bag's weight settled against her spine. Below, the small harbor on Mór's leeward side held three boats. Two belonged to the island. The third had belonged to her mother before it became hers by the plain arithmetic of death.

Sael shifted on her mooring line when Nael stepped onto the shingle. A low wooden creak. The sound touched something old in her chest. Her father had built that sound into every rope and spar he ever handled. She knelt and put her hand on the wet gunwale.

The wood was colder than skin. Not cold enough.

She loaded the bag. Untied the painter. Pushed the boat free of shore and climbed in after it, boots wet to the ankle. The oars found the locks with a sound too loud for the hour. She rowed without looking back at the lighthouse.

Only when she had cleared the cove and the swell took the boat under it did she lift her head.

Mór stood above the sea like a fist of black stone. The lighthouse lantern was dark. She had not lit it. There was no ship due before daylight. For a moment the unlit tower looked wrong to her, as if she had left part of her own body standing there empty.

She turned the bow toward Tharn.

The channel between the islands was narrow enough that she could feel its currents through the oars. The Harrows were always like that—small enough to know in the hands, in the calves, in the soles of the feet. A place measured not by miles but by weather, tide, and the weight of stone under your step. She had spent thirty-one years with these waters. They had shaped her the way they shaped the cliffs: slowly, without asking.

Tharn's harbor came up out of the dark by degrees. First the smell of tar and fish. Then the breakwater's shape. Then the low clustered houses, their roofs humped with turf and slate, crouched against the wind. No lights in the windows at this hour, except one.

Em's workshop.

Nael shipped the oars, let the boat drift the final length, then caught the quay ring on the first try. Her father's knot held fast under hands that had learned it before they had learned writing. She stepped onto the stone.

The harbor was empty. Nets hung stiff on poles. A line of crab pots leaned against a wall silvered with salt. Somewhere inland a sheep coughed in its sleep. The workshop door showed a blade of warm light at the sill.

She crossed to it with the bag over her shoulder.

Inside, the room was amber with greysheet lanterns. Their light was never bright. It lived in the air more than on surfaces, a dull cold-blue softened by soot and distance, but Em always kept a peat stove going in the back of the workshop, and the two lights together made something gentler. Benches along the walls. Tools hung in neat rows. Sheets of dried grey membrane stacked in shallow drawers. The smell of worked greysheet—mineral, clean, faintly like rain on stone.

Em was awake.

He sat at the main bench with a scraper in one hand and a half-shaped lantern panel before him, though from the stillness of his body she knew he had not been working. He looked up when she opened the door. His eyes went first to her face, then to the bag, then to the wet hem of her trousers.

He put the scraper down.

Neither of them spoke. The warmth of the workshop hit her skin and stopped there, unable to get all the way in.

Em stood. He was shorter than she was, broader through the shoulders, his hands thick with the work of shaping brittle things without breaking them. The grey dust of the sheets marked his fingertips. He looked as though he had been waiting a long time and had used work to keep from walking down to the harbor to make sure he was not waiting for nothing.

Nael said, "I'm going."

His face changed once. A weather shift. Quick and visible and gone.

"Wait," he said.

He crossed to the peg by the back wall, took down his coat, then the canvas bag he used when he went out to Vesk for long jobs. He moved with no hurry and no uncertainty. A wrapped tool roll from the shelf. A lantern. A packet of bread from beside the stove. The ordinary things of a person preparing to leave for a day. Or longer.

Nael watched him. The workshop hummed with the low residual light of the greysheets. Outside, the harbor lay dark and hard under the cold.

"You don't have to," she said.

Em slung the bag over his shoulder. "I know."

He came to stand in front of her. Close enough that she could feel the heat of his body through two coats and the salt-damp air between them. Close enough that if she let herself, she could put her hand on his sleeve and feel his pulse in the wrist beneath.

She did not.

He took the spare oil flask from the shelf and handed it to her instead.

Together they went back down to the harbor.

The boat rode lower with his weight in it. He stepped in after her and took the bow line without being asked. She pushed them off the quay. The harbor stones slid away. The workshop light shrank, then turned in the water and broke.

When they cleared the breakwater and Tharn opened behind them in one long dark shape, Nael felt it.

Not in the water this time. In herself.

The connection stretched eastward and down, thin as a membrane drawn over too wide a frame. The Harrows fell behind, and with them the shelf above the Sunder, the lighthouse, the eastern shore, the paths of her life worn into peat and stone. She waited for the pull to lessen. For distance to become absence. For the wire in her sternum to snap.

It only thinned.

Still there.

She kept her hands on the oars. Em sat in the stern facing her, saying nothing. Beyond him the islands were already reducing themselves to what they would become by dawn: shapes, then shadows, then memory.

The sea moved under the boat with the slow confidence of something that had nowhere else to be.

Nael rowed east into the dark, and the thing beneath the world went with her.