A group of young professionals travel to the Westman Islands off the coast of Iceland to attend an old friend's wake. Their reunion soon turns into a living nightmare, as the memories of a party they attended at university, and desperately tried to forget, come rushing back.

When two bodies are found on a rocky beach close to the refurbished lighthouse keeper's house that the group had stayed in, medical examiner Iðunn is sent to provide the local police assistance. For Iðunn, who grew up on the island, this takes her back to the heart of her complex family and the ghosts of her own past she would prefer to keep at bay. But as the deadly secrets soon become insurmountable, can any of them escape unscathed?