Doctor André Collmann's wife is shot in an attack on his country house. The doctor himself was not present at the assassination attempt. Chief crime commissioner Judith Mohn and colleague Freddy Breyer puzzle over the motive of the attacker. Then a friend of Collmann is kidnapped and a video of the perpetrator is received by the police: he demands that Nadine Abeck's case be resumed. The truth has to come out within 72 hours, otherwise Robert Haffner will die. The background seems to be justified on a party night seven years ago. At that time, Wolfgang Abeck's daughter fell into an irreversible coma. Now Nadine Abeck died a few days ago and this was the trigger for Wolfgang Abeck's self-justice. In addition to the search for Abeck, Mohn tries again to ascertain the circumstances surrounding the party night. She knows that to solve the case, the truth has to be revealed.