A Dane enters a restaurant and argues with the owner. He shoots the owner. No one "saw" the killer. The police team, now led by Alex, investigates. The Dane finds it useful that his lawyer is Alex' brother.

A girl finds her mother lying dead at the foot of the stairs. Is it an accident or murder?

Simon Lindström, the popular coach of a suburban junior hockey team is found stabbed to death. Does the murder have something to do with his side project: teaching unaccompanied refugee children to ice skate? This undertaking has certainly not been appreciated by everyone in their small, sheltered community. Martin Beck, who has returned in a more senior position, struggles to find a replacement for the temporary head of the group, Steinar Hovland. But the Norwegian is becoming more and more interested in keeping his new role. The question is whether Martin can trust

A man is beaten to death in the Middle East. In Stockholm, a young woman disappears on her way home from work. These two events will prove to be related. Since Martin Beck has quit, Steinar Hovland leads the search for the missing girl. But Martin is drawn into the case when he decides to help the national Security Police investigate a suspected terrorist. They soon realize that they are in a race against time to stop a catastrophe.