William Day should be an acclaimed Arctic explorer. But after a failed expedition to find the fabled Open Polar Sea, in which his men only survived by eating their comrades, he returned in disgrace. A cannibal. A murderer.

Thirteen years later, his second-in-command, Jesse Stevens, has gone missing in the same waters. Perhaps this is Day’s chance to restore his tarnished reputation by bringing Stevens – the man who’s haunted his whole life – back home. But when the rescue mission into the frozen wastes becomes an uncanny journey into his own past, Day must face up to the things he’s done.

Aboard ship, Day must also contend with unwanted passengers: a reporter obsessively digging up the truth about the first expedition, and Stevens’s wife, a spiritualist whose séances both fascinate and frighten. Following a trail of cryptic messages, gaunt bodies, and old bones, their search becomes more and more unnerving, and it is clear that the restless dead are never far behind.