Philippe Darland, a former motorcycle rider who stopped the competition after an accident, helps his uncle in his private detective agency. One evening, he goes to Elisabeth Leroy, who has called on them. Her sister Valerie has been missing for three months and the research conducted by Commissioner Turielle did not help. Darland's investigations will bring him into the drug business.

Director: Michael Schock

Writer: Michael Schock, Claude de Givray, Jean-Pierre Thomacini

Actors: Thierry Lhermitte, Véronique Jannot, Daniel Duval

Production: N/A