The wealthy 35-year-old diplomat Jerome Montcharvin (Jean-Claude Brialy) returns from Sweden to holiday in the scenic lake resort of Annecy (in western France, near the Swiss border), where he spent his childhood in a villa. The smug ladies man tells his attractive single Romanian novelist friend Aurora (Aurora Cornu, a novelist and poet in real life), a guest in his divorced neighbor Ms. Walter’s (Michèle Montel) house, that he’s engaged to a Swedish UNICEF worker, now in Africa, and is through fooling around with women and will join his future wife after the summer in Stockholm. But he’s encouraged by Aurora to flirt with Ms. Walter’s teenage daughters, from her two previous marriages, the headstrong love struck 16-year-old Laura (Béatrice Romand) and the sensuous but superficial older sister Claire (Laurence De Monaghan), and keep her informed of events.