Cantinflas is a member of the Academy of Military Aviation. With a 24-leave pass, Cantinflas returns to a ranch where he left his sweetheart and worked before. His former boss wants Cantinflas to marry his daughter, but Cantinflas doesn't find her very attractive. So, he must invent ways of getting out of the marriage.

"Cantinflas captures three bandits who had robbed a bank the night before. Considered a hero, Cantinflas is given the title of Agent 777 because of his ability to disguise himself in many different forms. In his ultimate assignment, he transforms himself into a wealthy jewel collector to set up a group of gangsters."--Container.

Concerns over governmental corruption find the bad guys routed in high comic fashion when they cross paths with the assignment of a trouble-prone photographer.

Cantinflas sneaks into a cabaret, dances with a beautiful actress and retrieves her necklace when it is stolen by thieves. She invites him to the studio where she is filming The three musketeers, and he is mistaken for an extra.