Carl Morck and Department Q returns with the ninth case.

Marcus Jacobsen, head of the murder department, meets his best investigator Carl Morck over the case that impressed him deeply. The employees of the Q Department will grow under the hands of an unpleasant tangle of cases. A special task forces Carl, Assad, Rose and Gordon to get together firmly together.

After the Q department immerses in the investigation of the deaths of prominent personalities who have so far been considered suicide or misfortune, they will reveal a far worse pattern of action and everything suggests that another person will soon die. In order to prevent cruel death, they will start in a difficult time of anticovide measures with a typical dose of humor and cohesion to a thrilling time to fight for time. But in the meantime, from Carl's past like a snake that finally snapped his prey, he emerges a quite different case.