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.
An unhappy middle-aged banker agrees to a procedure that will fake his death and give him a completely new look and identity – one that comes with its own price.