The film starts by showing the adventures of the boy in school and his first sexual experience at a brothel. When the boy is found to have a heart murmur after a bout of scarlet fever, he goes with his mother to a sanatorium, where a series of circumstances lead to a sexual encounter with his mother. Jazz music by Charlie Parker and Dizzy Gillespie, along with books by Bataille, Proust and Camus, feature prominently in the film.
Lea Massari – Clara Chevalier
Benoît Ferreux – Laurent Chevalier
Daniel Gélin – Charles Chevalier
Michael Lonsdale – Father Henri
Ave Ninchi – Augusta
Fabien Ferreux – Thomas Chevalier
Marc Winocourt – Marc Chevalier
Gila von Weitershausen – Freda
Murmur of the Heart was nominated for Best Original Screenplay at the 1973 Academy Awards. It was also in competition, in the French part of the official selection, at the 1971 Cannes Film Festival.