Pontus is divorced and has custody of his children every other week while living life as a bachelor the rest of the time. His older brother, Jens, is married since 20 years and has three children. When Jens' marriage collapses, he moves in with his younger brother - a move which will change both of their lives radically.

A serial-killer attacks and murders young girls in the parks of Stockholm. The police have trouble finding any evidence to find the killer. But when a newsstand is robbed in one of the parks while the murderer strikes again, police inspector Martin Beck believes that the robber may be an important witness. Plot by Mattias Thuresson.

Three brutal murders are committed in a house in a quiet suburb. The victims are a former police officer, his wife and their 10 year old son. The Beck group takes on the case and find that there is a hidden security room in the victims’ house, containing stolen weapons. They find fingerprints from a criminal who was involved in a robbery 4 years ago. After the robbery, he shot his accomplices and disappeared without a trace, along with their haul of 6.3 million. The question is how the former police officer ended up with the weapons and how is he connected to the thieves? The case wakes strong feelings at Police Headquarters and takes highest priority.

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.

The police is under heavy media pressure after fatally shooting a 14-year-old boy. A demonstration against the violence gets out of hand and the police have to take further blame.

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.

A young gang member is found dead, and the Beck group's investigation indicates that a drug network is behind it. Klas Fredén has been monitoring the network for a long time, and the Beck group - led by Alex Beijer - is most graciously allowed to work with the murder investigation in parallel. She will soon end up on a collision course with Fredén. Thus, Martin Beck, who is now head of department, is also involved in the case.

The bodies of two buried men are found and despite persistent attempts, they cannot be identified. When another man is murdered they discover new evidence that soon leads them to an Islamist terrorist cell.