In director Philippe de Broca's vast production this is probably the most underrated effort: almost fallen into oblivion (no DVD out) this movie is a gem of wit and innocence. You have to accept the utter futility of the plot and the impossibility to believe the twists, to enjoy the grace of youth displayed by Marthe Keller (the films constantly captures her long, naked, legs as she runs or rides a bike in the French countryside), the wonderful comic performances by Marielle and Rochefort, the consummate acting of Madeleine Renaud and the serene charm of Montand.
Though extremely lighthearted and quick-paced, the film manages to be poignant thanks to the superb score by Delerue (De Broca said that he would like the piano theme he composed to be played at his own funeral). What makes this film so special for me is the feeling of freedom that radiates from the characters as they move about in this tale, completely separated from social or political issues (remember the film was made in 1968). They manage to convey innocence while frantically pursuing love, happiness and enjoying themselves.