There is the murder of a gangster. The gangster's girlfriend goes to stay with her mother. The mother is the housekeeper of an upper middle-class family with an attractive son. The gangster's gang follows the girl, and the police the gang.
Movie opens with a murder involving gangster. Gangster's girl goes to stay with mother. Mother is the housekeeper for upper class family with an attractive son. Family returns early from vacation. Gangster's gang follows girl to house, police follow. Comedy ensues.