Katja and Mathias take photos on a construction site. They fool around with a pistol that Katja found in her father's house. Suddenly an accident occurs: A shot is fired and accidentally hits a bum who is on the premises.
Elmar Baumann, single, former owner of a jewels business, is stabbed in his villa. When Marc and Rex arrive at the crime scene, Rex realizes that the victim is still alive.
Teenagers Thomas and Lisa are secret lovers. Lisa is 7 months pregnant. After a boozy party Thomas' friend Manuel dies. None of the others at party seem to remember anything