This film noir tends to stay within very conventional plot lines, as the narration by the main protagonist, private detective Eugene Tarpon Jean-François Balmer, recites a dreary litany of how he wanted to chuck his profession until an attractive woman shows up asking him to investigate the murder of her roommate, a porno star. Soon Tarpon is up to his neck in trouble: the police, gangsters, and the victim's lover are all out to get him.
Jean-François Balmer
as Eugène Tarpon
Sandra Montaigu
as Charlotte Le Dantex
Pierre Santini
as Coccioli
Roland Dubillard
as Jean-Baptiste Haymann
Claude Chabrol
as Théodore Lyssenko
