Benjamin Ballon wants to be a filmmaker, and has devoted a large part of his life for the past few years to getting to the point of filming an independent movie. He has been encouraged by Carmen Maura (playing herself), an established star, who has agreed to appear in his first film, and it is her level-headedness, calmness, and general good sense that keeps the project moving along, despite Benjamin's inexperience and a very temperamental male lead. On one occasion when the male lead is hours late for a shoot, her calm is the only thing which keeps the crew from walking out. The title comes from Maura's habit of bringing homemade tortillas to meetings, and using them to get her way.

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.

Heavy traffic in the summer. Bad luck for Juliet, Albert, Jaeger and Arthur who does not reach their destination. Involved in a terrible accident that will change their lives forever.