In the 1950s, in a small provincial town, a young inexperienced judge clashes with an influential notable during an investigation into a suspicious death. His perseverance to get to the truth will cause a huge scandal.

The ambitious police officer Cruchot is transferred to St. Tropez. He's struggling with crimes such as persistent nude swimming, but even more with his teenage daughter, who's trying to impress her rich friends by telling them her father was a millionaire and owned a yacht in the harbor.