Cool cocktails and flying fists. When Chief Inspector Pit 'Struller' Struhlmann and his intern Jensen search the remnants of a motorboat that previously exploded with a thunderous crash in the Düsseldorf harbor, they discover a bound female corpse. The turbulent investigations lead the two quick-witted cops this time into dark old town dives, noisy party bars, a porn film shoot, and ultimately they must question whether, in the case of a deranged performance artist, genius and madness might blend a little too seamlessly. The tone becomes rougher, the pace harder, and a knockout doesn't have to come from a clenched fist; it can also be served charmingly in a cocktail with a slice of lemon.