Siglufjörður: an idyllically quiet fishing village in Northern Iceland, where no one locks their doors – accessible only via a small mountain tunnel. Ari Thór Arason: a rookie policeman on his first posting, far from his girlfriend in Reykjavik – with a past that he’s unable to leave behind.

When a young woman is found lying half-naked in the snow, bleeding and unconscious, and a highly esteemed, elderly writer falls to his death in the local theatre, Ari is dragged straight into the heart of a community where he can trust no one, and secrets and lies are a way of life. An avalanche and unremitting snowstorms close the mountain pass, and the 24-hour darkness threatens to push Ari over the edge, as curtains begin to twitch, and his investigation becomes increasingly complex, chilling and personal. Past plays tag with the present and the claustrophobic tension mounts, while Ari is thrust ever deeper into his own darkness – blinded by snow, and with a killer on the loose.