American secret agent Alan Milner is charged to get back a lot of uranium being transported to an enemy power by a criminal gang led by Otis. The agent must follow a number of leads until getting aboard a merchant ship off the Moroccan coast, where he will have the last of a number of fights.
| Directing | Alberto Leonardi | Director |
| Writing | Preston Leonide | Writer |
| Writing | María del Carmen Martínez Román | Screenplay |
| Writing | María del Carmen Martínez Román | Story |
| Production | Ángel Rosson y Rubio | Producer |
| Sound | Piero Umiliani | Music |
| Camera | Alfonso Nieva | Director of Photography |
| Editing | Rosa G. Salgado | Editor |
| Production | Santos Alcocer | Production Manager |
