Claude Chabrol	...	(Director)
Charlotte Armstrong, Claude Chabrol	...	(Writer)
Isabelle Huppert	...	Marie-Claire 'Mika' Muller
Jacques Dutronc	...	André Polonski
Anna Mouglalis	...	Jeanne Pollet
Rodolphe Pauly	...	Guillaume Polonski
Brigitte Catillon	...	Louise Pollet
Michel Robin	...	Dufreigne
Mathieu Simonet	...	Axel
Lydia Andrei	...	Lisbeth
Véronique Alain	...	Madame le Maire
Isolde Barth	...	Pauline
Jacqueline Burnand	...
François Germond	...
Antoinette Martin	...
Michel Moulin	...
Dorotea Brandin	...
Matthieu Chabrol	...	Original Music Composer
Renato Berta	...	Director of Photography
Monique Fardoulis	...	Editor
Jean-Marie Daunas	...
Catherine Epars	...
Rodolphe Ittig	...
Nathalie Gaubicher	...
Sibylle Blanc	...
James Hauduroy	...
Anthony Glur	...
Alberto Soccorsi	...

Summary: In Lausanne, the aspirant pianist Jeanne Pollet has lunch with her mother Louise Pollet, her boyfriend Axel and his mother. Lenna leans that when she was born, a nurse had mistakenly told to the prominent pianist André Polonski that she would be his daughter. André has just remarried his first wife, the heiress of a Swiss chocolate factory Marie-Claire "Mika" Muller and they live in Lausanne with André's son Guillaume Polonski. Out of the blue, Jeanne visits André and he offers to give piano classes to help her in her examination. Jeanne becomes closer to André and sooner she discovers that Mika might be drugging her stepson with Rohypnol. Further, she might have killed his second wife Lisbeth.