Matthew Cave's father Tom has been in hiding for years, after being accused of a double-murder. When Matthew's sister disappears during a weekend away with friends, Tom's case is re-examined. Matthew must investigate whether his long-lost father is guilty, as Greenland police and the American military also close in on the fugitive. As Matthew starts to unravel a terrible conspiracy, he must also face grave questions about his young friend Tupaarnaq, and whether her yearning for revenge has gone too far.