Un soir sur la plage is relatively interesting; the cast includes highly talented Jean Dessailly, Martine Carol, a cast against type Michel Galabru as the cop.The biggest surprise is sixties starlet Daliah Lavi as a simple-minded nymphomaniac girl who is murdered on the beach. The story is essentially a whodunit: in Martine Carol's house, there are many people (too many people actually) and they all have a reason to get rid of her.

Brigitte, the beautiful daughter of the French premier, falls for one of her father's aides, the womanising Michel, and attempts to get him to settle down with her. However, as Michel can't curb his flirtations with other women, Brigitte makes a play to seduce the married Prince Charles, resulting in a battle of wills between the gorgeous girl of privilege and her beau.