Hannover, Pet Fair. Tomcat Socke is eager to find one of his relatives when he stumbles not over his roots, but over a corpse. The body in the snow is that of the guard Dennis Dragowski. Was he murdered with his own baton? Chief Inspector Peter Flott, Socke's owner, begins the investigation. But Socke and his furry team are also on the trail of the culprit. Does the guard's death have anything to do with the disappearance of an award-winning pedigree cat? Meanwhile, Peter Flott digs into the victim's love life, which not only brings friends into the picture.