Secret agent Richard Warren poses as a journalist in Caracas to sell a secret uranium formula. A dancer named Sylvia approaches him and warns him of danger. A short time later, the young woman is dead. Richard finds her body, with a red tassel lying next to it. The secret agent is suspected of murder and flees. He finds shelter with the attractive Regina, but she apparently harbors a secret ...

A young doctor saves head secretary from a group of hired murderers and frees her from suspicion.

On the way from Mexico City to Caracas, a plane crash-lands on an uninhabited island. The criminal Mario Bertelli terrorizes the other survivors. He prevents them from sending emergency signals.

Seven women take off on a cargo boat for a cruise, after graduating from an exclusive boarding school in Switzerland. They party with the ship's crew, but in port they meet up with Manuel, who runs a meteorological station with his father on a remote Amazon island. While out there, Manuel's father has found a crashed airplane carrying gold ingots. Manuel goes to the mainland to tell of his father's finding and is overheard by a gangster. The gangsters head over to the island and shoot Manuel's father, but Manuel escapes. Murdok captures some of the girls, who must fight off some of the gang members' evil intentions. Eventually the rest of the girls and Manuel arrive to the rescue, but Murdok gets away only in time to be shot by the police.