Claude Rivory

To receive the inheritance of his uncle, who died in Brazil, Claude, who has no money, must absolutely marry one of his three cousins.

For fun and to dazzle his wife, the novelist Morgan steals a ring and gets rid of it in the costume jewelry section of a supermarket. Sophie buys the diamond, which forces the novelist to embark on crazy adventures to recover the jewel.

Prince Boris, engaged to marry Princess Dorothea, meets and falls in love with journalist Monique in Cannes.