Three Munich cops have hired the professional killer and Vietnam veteran Ricky (Karl Scheydt). He is supposed to kill people they cannot kill as “guardians of the law”. Before taking care of his task, Ricky meets his old friend Franz (Fassbinder). Ricky’s first victim is a gypsy, the second is a girl who deals with porn magazines and sells information. Since her boyfriend is present, Ricky kills him, too. When Ricky requests a girl in the hotel, his clients send him Rosa (Elga Sorbas), a lover of one of the cops’. She falls in love with Ricky. After a brief visit with his mother and brother, Ricky receives his last job. He is to kill Rosa. He does it without hesitation. The showdown takes place at the main station. Distracted by the arrival of Ricky’s mother and brother, Rick and Franz are shot by the police.