Emergency call from the pathology department: a corpse has disappeared! The deceased is none other than the father of state parliament representative Elke Schwiers. For years, she has been pushing for the privatization of the clinic and thus also the closure of the pathology department.

Christina Bayer has arranged a training session with her tennis coach. However, when she arrives, he is lying dead on the court—killed with his own tennis racket! Club president Bernhard Seibel knows that the victim had no enemies and suspects revenge by a cuckolded husband. But then Yazid finds an injured scooter rider in a ditch. He is the groundskeeper at the tennis club and claims that a stranger forced him off the road. Could there be a connection to the murder of the tennis instructor?