A secret apparatus that controls bombs by remote control is stolen from a laboratory. A federal agent is assigned to recover it, and his investigation leads him to a creepy mansion that is honeycombed with secret passage ways.
| Directing | Robert F. Hill | Director |
| Writing | Al Martin | Screenplay |
| Writing | Peter B. Kyne | Story |
| Production | Sam Katzman | Producer |
| Editing | Dan Milner | Editor |
| Art | Fred Preble | Set Decoration |
| Production | Ed W. Rote | Production Manager |
| Sound | Hans Weeren | Sound |
| Lighting | Otto Bühler | Lighting Artist |
| Camera | William Hyer | Director of Photography |
