When You Read This Letter(Quand tu liras cette lettre)

The English-language title of this French romantic melodrama is When You Read This Letter. Juliette Greco plays Therese, a nun-in-training who returns to "civilian" life to care for her young sister Denise (Irene Gatter). When Denise is compromised by love-'em-and-leave-'em stud Max (Philippe LeMaire), Therese forces Max at gunpoint to propose marriage to the hapless girl. Fascinated by this extreme behavior, Max falls madly in love with Therese. (AllMovie)