The sun didn't set so much as it surrendered.
Elias stood on the bridge of the Mariner's Ghost, watching the last sliver of weak, orange light slip behind the jagged white teeth of the northern ice shelf. For three years, the sun had been his only constant—a brutal, salt-stinging companion that marked the time between meals and the shifts of the watch. Now, it was gone, leaving behind a sky of bruised purple that rapidly bled into a terrifying, absolute black.
"Polar night," Miller whispered, his voice a dry rasp. He flipped a switch on the console, but only a faint, flickering amber glow responded. "The sun won't show its face for another sixty days. From here on out, we're sailing on ghosts and luck."
The temperature outside had plummeted to a lethal -40°C. The hull of the ship groaned, the steel contracting in the cold with sounds like pistol shots. Inside, the walls were thick with hoarfrost. They had draped heavy tarps over the doorways to trap what little heat the dying engine provided, but the air still felt thin and brittle, like it would shatter if Elias breathed too hard.
"Status on Mara?" Thomas asked, emerging from the galley. He was wearing three layers of wool and a parka stiff with frozen sea spray. He carried a small lantern that cast long, dancing shadows against the frost-covered walls.
"She's still in the cold-coma," Sarah replied, stepping out from behind a tarp. Her face was gaunt, her eyes sunken. "I've moved her to the lowest deck, right against the hull. The ice on the other side of the steel is keeping her internal temperature just above freezing. The mapping... the violet threads... they've turned white. They're dormant, for now."
"But she's still breathing that mist," Elias said, his voice tight. "Every time she exhales, I see the spores in the lantern light. We're trapped in a tin can with a sleeping bomb."
"We don't have a choice, Elias," Thomas growled. "If we move her, she wakes up. If she wakes up, she sings. And if she sings, the Shepherd finds us."
The silence of the Arctic night was heavy. Without the sun, the sense of direction vanished. The Mariner's Ghost was wedged into a lead—a narrow channel of open water between two massive ice floes. They weren't moving; they were drifting with the pack ice, a tiny speck of metal in a desert of white.
"Did you hear that?" Miller asked suddenly, his hand hovering over the dim instrument panel.
Elias went still. At first, there was only the wind—a low, mournful howl that sounded like the voices of everyone they had left behind in Savannah. Then, he heard it.
Skritch. Skritch. Skritch.
It wasn't coming from the water. It was coming from the ice.
Elias grabbed a thermal-imaging scope from the rack. He stepped out onto the deck, the cold instantly seizing his lungs. He raised the scope and scanned the white expanse surrounding the ship.
The world through the thermal lens was a field of deep blue, indicating the sub-zero temperatures. But then, he saw them.
"Walkers," Elias whispered into his comms.
There were hundreds of them. They weren't jerky and robotic anymore. In the extreme cold, the virus had changed the infected's physiology. Their limbs were longer, their movements fluid and predatory. They weren't walking; they were skating across the ice on elongated, obsidian-tipped claws.
Worst of all, they were white. Their skin had turned a translucent, snowy pallor, making them nearly invisible to the naked eye in the dark. Only the faint, orange heat signatures of their pressurized, virus-filled hearts gave them away.
"They're surrounding us," Elias said, his heart hammering. "They aren't attacking. They're... they're waiting."
"Waiting for what?" Sarah asked from the doorway.
As if in answer, a sound erupted from the deep beneath the ship. It wasn't a roar. It was a vibration so powerful it shattered the frost on the windows. The ice floes on either side of the Mariner's Ghost began to grind together, the pressure mounting against the ship's rusted hull.
The Shepherd wasn't just hunting them; it was using the ice to crush them.
"Miller! The engine!" Thomas roared.
"It won't turn! The oil is like molasses!"
Elias looked back at the thermal scope. The white Walkers were closing in, their obsidian claws clicking against the steel of the hull. They were climbing.
"They're not here to kill us," Elias realized, a cold dread washing over him that was sharper than the Arctic air. "They're here to wake her up."
From the lower decks, a sound began to rise. It started as a low hum, vibrating through the floorboards. It was Mara. Even in her frozen coma, her body was responding to the Shepherd's call. She was beginning to sing.
"Sarah! The sedative!" Elias screamed, diving back through the tarp.
He scrambled down the ladder to the lower deck. The air down there was even colder, the walls shimmering with ice. Mara lay on a cot, her skin the color of milk. Her eyes were still closed, but her mouth was open, the wordless melody pouring out of her throat.
The violet threads on her arm had turned a brilliant, glowing white. They were pulsing in time with the Shepherd's heartbeat.
Elias reached her just as the first white Walker shattered the porthole above them. A long, spindly arm, tipped with obsidian hooks, reached into the room.
"In a world where nothing survives," Elias gritted his teeth, grabbing a flare and jamming it into the Walker's reaching hand, "you don't get to have her!"
The flare ignited, a blinding magnesium white that filled the small cabin. The Walker shrieked—a sound like metal tearing— and recoiled into the dark. But Elias knew it was just the first. The long night had only just begun.