A professional runner can't run anymore since he has a heart condition.

Benito a railway switchman, one day hears a bugle call and go across a squad of American riders. Fearing an invasion, will look for help, but no more than the making of a film. The appearance of Benito on the set coincides with an explosion of dynamite that does blow. That's how Benito enters into contact with the amazing world of cinema.

The lieutenant Miguel Aguirre's dream is to become a military pilot, but a dispute with a superior is about to make him abandon his studies, had it not been for the intervention of his mother and his girlfriend, Luisa. Miguel's first destination is Granada Air Base. There he meets an attractive young woman, Patricia, whom he takes for an American tourist.

An old priest, who has old ideas, is intended to exercise the apostolate in a neighborhood in the suburbs of Madrid. There the revolutionary climate and anti-religious character of the congregation thwarts all his attempts to attract them. The Archbishop admonishes him and asks to renew his methods, using the example of a young priest of a modern parish. The old priest tries to apply in his environment what he has seen in the parish model, setting off a chain of events.