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.
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.
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.
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.
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.
Intern KIM Min-ji is ambubagging patient LEE Sook-ja. The 86-year-old Sook-ja's condition is not very well. It looks as if she's ready to depart from the world. Despite constantly paging Sook-ja's grandson and guardian, he has yet to appear. Min-ji is ambubagging Sook-ja when she gets an urgent call from her Mother. Her mother tells her to hurry because Min-ji's sister is having a baby.