A mineral is discovered which can turn metal to gold or humans into zombies. When the mineral is stolen, secret agents are sent in to get the mineral back!
| Directing | Jesús Franco | Director |
| Production | Artur Brauner | Producer |
| Camera | Manuel Merino | Director of Photography |
| Writing | Ladislas Fodor | Screenplay |
| Writing | Edgar Wallace | Novel |
| Writing | Paul André | Screenplay |
| Editing | Clarissa Ambach | Editor |
