Police aspirant Vilhelm Beck joins his supervisor on a routine case, only to discover a dead 17-year-old boy at the crime scene, prompting Alex, Martin, and their team to investigate.
A man is found dead at a flea market in southern Stockholm. It looks like an ordinary robbery gone wrong, but the investigation takes an unexpected turn when the secret police (Säpo) takes an interest in the case.
Nothing is the way it should be in the Beck group. Josef is suspended, pending an internal investigation. Klas Fredén and Josef offer to help him. But nothing in life is free.
Josef returns to duty with the Beck group and they are called out to investigate a man who was brutally murdered in his own home. The victim turns out to have a criminal record.