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.
A disgruntled scientist is fired from his job; slipping into madness, he invents a machine which harnesses the airwaves and can shoot people through the TV screen.
A tow truck driver becomes the impresario, then the singer of a new rock band.
