Julien (Jacques Dutronc) is a pianist who is determined to regain everything he lost when his wife Jeanne (Isabelle Huppert) divorced him, as much for revenge as for any other reason. He calmly stages a murder on the grounds of his ex-wife's home, carefully using her new husband Kern's (Bruno Ganz) pistol so as to frame him for the deed. Then he awaits developments. Jeanne calls to ask him to come and be with her and the children, to bolster their spirits while her husband is being investigated. One-pointedly, he arranges to seduce her, but she resists until just before the police come searching for the real murderer.
Source : allmovie.com