Michel, a psycho-analyst, falls asleep while listening to his patient Olga, a kleptomaniac and a sexual pervert, tell him how she likes her husband beating her. When he wakes up, he finds Olga having been choked to death. He now has to deal with a body, with Olga's rich husband who thinks she stole money from him, and with all his patients' insanity that haunts him.
Antoine Rivière, a highly-reputed psychoanalyst, is visited by a new patient, Edouard Berg. When Berg claims to have killed his own wife, the doctor suspects he is a compulsive liar. How could he know that he has been caught in a trap and it's already too late for escape?
A mediocre pulp novelist is approached by a stranger claiming to be a serial killer with a proposition to chronicle his crimes.
