Fred, a raffish safe blower, takes refuge in the Paris Metro after being chased by the henchmen of a shady businessman from whom he has just stolen some documents. While hiding out in the back rooms and conduits of the Metro, Fred encounters a subterranean society of eccentric characters and petty criminals.
Benoit has been driven to voyeurism and impotence due to having a cold, treacherous industrialist as a father and an exhibitionist aunt who constantly parades around nude. Jean-Pierre is a thief. Isabelle is a runaway whose stepfather tried to rape her. When the three cross paths, criminal activity, rape, madness and murder follow in this psycho-drama filled with soft-core sex.
As Dominique Marceau is being tried for the murder of Gilbert Tellier, accounts by different witnesses paint a picture of the kind of relationship the two used to share.
