A bomb explodes in a toy store window, the third in a string of Gurmann teddy bear bombings. With Rex taking care of a bedridden Richard, Stocki investigates a long list of disgruntled employees. The investigation takes a turn when Richard is visited by the heiress of the Gurmann toy company.

A bag with human intestines is found in the sewers. A corpse with no clues for his identity and a very difficult case are waiting for inspector Moser and Rex,who went from the shower to the sewer.