Jean-Michel, the couple’s son, returns from holiday and informs his father Georges that he has fallen in love with a girl called Anne and intends to marry her. Dismayed by the fact that Anne’s father, Edouard Dindon, is an ultra-reactionary politician who plans, on re-election, to sweep the Riviera clean of drag clubs, Georges is even more appalled to learn that Jean-Michel doesn’t want Albin to be there to meet Anne’s parents. Instead he wants Sybil, his biological mother, to play George’s wife for a day, even though it was Albin who brought up Jean-Michel for all of 30 years. Albin is deeply shaken that his own son has rejected him in such a way.
To enable Albin to attend the family meeting anyway, Georges comes up with a plan to have Albin playing the role of Uncle Albert, with studied stereotypical masculinity. But shortly before the Dindons arrive, Albin suddenly disappears – and Sybil too, as usual, fails to appear. All the greater is everyone’s surprise when Jean-Michel’s mother turns up after all. She saves the evening by arranging a table at Chez Jacqueline, the best venue in St. Tropez. When they get there, Jean-Michel’s mother is unexpectedly asked by Jacqueline herself to sing a song as the one and only Zaza. Eventually persuaded, Zaza even manages to get the Dindons to join in. Everything seems to have worked out until the fi nale when – old habits dying hard – Zaza whips off her wig to reveal Albin underneath.
The Dindons storm out of Chez Jacqueline in consternation. Jean-Michel in the meantime has realized that he made a dreadful mistake and apologizes to Albin, his mother. Although Anne stands up to her parents and insists on marrying Jean-Michel, it is Jacqueline that gets Edouard Dindon to change his mind. Aware of his political ambitions and the upcoming elections, she tips off the press to come and photograph him in the very nightclub district he plans to tear down. Dindon has no option but to consent to the marriage – and thus usher in a happy ending.