Set on the French Riviera, Otto Preminger's film concerns a wealthy Frenchman (David Niven) who openly cavorts with his mistress, under the watchful eye of his 17-year-old daughter, Cecile. Cecile embarks on her own steamy summertime affair with a boy named Phillipe (Geoffrey Horne). But when Cecile's straight-laced godmother, Anne (Deborah Kerr), expresses disapproval toward the girl's fling with Phillipe, Cecile devises a scheme to drive her godmother away--which causes a tragic turn of events. Based on the novel by Francoise Sagan.