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.

The series follows the adventures of lighthearted Jean-Paul Moulin, a police Commissaire, and his team as they solve crimes.

Larry, who is awaiting a large inheritance, lives with his uncle who hopes to receive part of the hefty sum. He meets another specimen of its kind, weak, lazy and eager to show off, who lives on the hooks of an elderly woman. The two thugs sympathize and cause, by game, a fatal accident. From perverse games to silly games, they enter a deadly spiral.

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.

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

Bandits see the fruits of their theft fall into the hands of black jackets.