An old gangster returns from the United States to Mexico City to live with his sister-in-law and his two nephews, where he will face the daily life of a middle-class family.
A young police inspector investigates the bank robbery and subsequent murder of one of the robbers, while discovering that his girlfriend has a lover, an old friend of hers and now their neighbor.
Aspiring entertainer George Trotter (George Formby) comes down to London in search of fame and fortune, but soon must try to clear his name after being accused of a murder at his lodgings.
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.
