A gunrunner loses his cargo near a small coastal Sudanese town so he's stuck there. When a woman hires him to raid a sunken ship in the shark-infested waters, he sees a chance to compensate for his losses. He's not the only one.

A political player is presumed dead in a traffic accident; his relatives all try to cash in on his estate while he goes into hiding with schemes of his own.

Juan from Altamira, Tamaulipas, arrives at the train station in the capital and is assaulted by Gus. As he finds only ten dollars in his wallet, he believes that Juan brings more money and offers him accommodation in his room to pay the rent. Juan is dedicated to singing and Gus makes his representative. Juan is successful singing together with Susana on stage and radio Azteca, but she does not correspond to his love. As she wants to succeed alone, she goes to Guadalajara but without success. Juan helps her and when she gets a heart illness, she agrees to marry him.

1968 film by Miguel M. Delgado

A singing cowboy falls foul of alien invaders and beautiful women from Venus.