The peaceful atmosphere of a hotel on the Italian Riviera is shattered by the arrival of Agatha, an outspoken widow, and her timid sister, Fiona. Agatha crushes all protests as she rounds up the guests into communal games, her unflagging spirit of togetherness invading the private lives of the other characters. All the ingredients of package holidays, late flights, double bookings, foreign food etc. - provide an evening of uproarious and innocent fun.