A couple who live in the French provinces are surprised to inherit a hotel in Paris. These new owners are determined to sell it, but that's without the charms, vagaries, and clientele of this typical inn implanted in a nice neighborhood.

A detective, fresh out of the academy (lowest mark in class), gets the assignment to bodyguard a spoiled rich girl reporter. She's been interviewed on TV and has questioned the virility of a mobster who kidnaps her later.

Millionaire Victor Danemore, living on the French Riviera, dies suddenly of a heart attack. His secretary, Dave Bishop, wants to know more about his employer's life. Surprisingly, not even his young wife knows anything about her husband's background or how he earned his fortune. Clues lead Bishop to Vienna and Stockholm, where he learns that Danemore was blackmailing people who cooperated with the Nazis during World War II.

Pétepan learns that his money has been lost by Robinhoude brothers.He asks his assistants to withdraw his amount from the bank.

Claude Brasseur plays a villain on the run from both the police and the mob. Good atmosphere in the Paris by Night, including deserted factory, Les Halles market and an empty theatre.

A small saver discovers the scam that threatens all subscribers to the "Caution foncière". He embarks on an incredible adventure to recover the funds paid in by his friends, and succeeds in exposing the scandal.