The cast and crew reflect back on the making of the film Léon - The Professional (1994).A series of interviews with people in different places, all of them involved in the film.

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.