Thomas' sister is a journalist and wants to talk to him but "drowns" just before. In her apartment he finds papers about biochemical weapons and the Danish intelligence agency their dead dad was in. Thomas investigates.

In this political thriller, a young woman is found drowned on a winter night by the sea. The dead woman's brother Thomas discovers that her death is connected to their father, now deceased, and his work in military intelligence. As Thomas digs deeper into the case, his family is brought into sudden danger.—Søren Kragh-Jacobsen