Derrick investigates a case that first seems like a robbery homicide. Then, jealousy is considered a possible motive. But is this all just a smoke screen?
Housemaid Rosy Kramer is found dead near her employer's house. Derrick comes to know that she has been in a nearby disco with her boyfriend, then accepted a car ride from an unknown man.
A pensioner who lives in a facility is found shot to death on the premises. But who shot him? Derrick smells foul play because it seems that the house staff have something to hide.
Achim is planning to earn some extra change washing cars. After offering his services to a few people, one agrees. A dead man lies in the trunk of the car, and Derrick finds an interesting revolver at the scene.
A young girl's body is found in a forest. Soon it turns out that she is an English exchange student who used to ride her bicycle alone, seeking for German company to chat with.
