A murder in a wooded area and a man who died suddenly in a heart attack after being awakened in the middle of the night by a masked burglar. Can the events have any connection? The Beck group is facing another tough case where internal tensions and loyalties are being put to the test.

The police authority is under heavy media pressure after a fatal shooting of a 14-year-old boy. A demonstration against the violence degenerates and the police have to take further blame. Some time later, a massacre takes place on a bus outside the Police Academy. A discovery made by Martin's grandson Vilhelm who goes to school will be an important piece of the puzzle to lead the Beck group further in the investigation.