The body of a young woman is found in a Stockholm hotel room. It appears that she has been strangled after a night partying with two young men, but the room was paid for using the credit card of a mugging victim whose alibi doesn't add up. Martin and Gunvald investigate under the supervision of their new boss Klas Freden.

It's Midsummer Eve and Julie sets her sights on Jean, Kristin's betrothed. What can Kristin do? Both she and Jean are employed by Julie's father. Julie gets her night with Jean. But at what cost?

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 him?

When a well-known crime boss is murdered by a sniper in front of his family, Beck and his team are challenged to discover which one of his many enemies could be responsible for the crime.

A jawbone is found in the middle of the forest. When the rest of the body is found, it turns out that it has just recently been moved and belongs to Viktor Eklund, who has been missing for five years.

A candidate for the Nobel Peace Prize is brutally stabbed to death in central Stockholm just after a meeting with two lawyers from the war tribunal in The Hague. One of the witnesses worked with Alex when she was in the Middle East.

During a police intervention, a macabre discovery is made in the trunk of a car. Josef and Oskar find themselves in the line of fire of a seemingly cold-blooded killer. But things are not what they seem.

Two traffic officers on a quiet morning shift try to stop a car for speeding. When the car finally pulls over, the driver gets out and shoots at them, killing one of the officers in cold blood. A national alert is issued and an extensive search for the ruthless killer begins, with the Beck group at the lead. Neither the officer’s shocked and wounded colleague nor any of the witnesses have seen anything helpful to the police. Finally, they find the car registration number using a surveillance camera. But, when they enter the car owner’s apartment, they find him shot to death. The first day of summer is a long one for the Beck group, as the killer has more victims on his list.

An investigative journalist is found beaten to death in his home, where the fingerprints of a notorious criminal debt collector are also found. The murdered journalist has been threatened by right wing extremists, but it is the victim’s work with a book about “society’s dark side” that captures the Beck group’s interest. When the case takes an unexpected and terrible turn, there is suddenly much more at stake than finding the journalist’s killer. Martin Beck and his colleagues have never had to protect the balance of their professional and private lives with the same tenacity as they do now.