When police investigator Sofia Kovic uncovers a startling connection between several Oslo murder cases, she attempts to contact her closest superior, Alexander Blix before involving anyone else in the department. But before Blix has time to return her call, Kovic is shot and killed in her own home – execution style. And in the apartment below, Blix’s daughter Iselin narrowly escapes becoming the killer’s next victim.

Four days later, Blix and online crime journalist Emma Ramm are locked inside an interrogation room, facing the National Criminal Investigation Service. Blix has shot and killed a man, and Ramm saw it all happen. As Iselin’s life hangs in the balance, under-fire Blix no longer knows who he can trust … and he’s not even certain that he’s killed the right man…