A serial killer is on the run, after escaping a mental institution. He befriends a woman and her child, but the urge to strangle women with red necklaces still haunts him.

Graf Bobby and Baron Mucki founded the detective bureau Pfiff and Greif to finally make money. Shortly before the bankruptcy of their company, they receive a lucrative order from Benevenuto Socrates Socre regarding a gang of girl traders.