Storyline Roger Henderson, the young son of a wealthy British gentleman, lives in one of those grand British country estates surrounded by huge gardens. When a Rembrandt painting is stolen from the vault in the basement of the mansion, Roger and John Wilson (young son of the butler) discover a secret tunnel leading from the vault to another building on the estate. They then set out on a dangerous mission to bring the smugglers to justice.
| Directing | William C. Hammond | Director |
| Production | Frank A. Hoare | Producer |
| Editing | Eric Hodges | Editor |
| Writing | Mary Cathcart Borer | Book |
| Writing | William C. Hammond | Screenplay |
| Writing | Pat Latham | Adaptation |
| Sound | Dick Smith | Sound Supervisor |
| Camera | A.T. Dinsdale | Director of Photography |
| Camera | Norman C. Allin | Camera Operator |
| Sound | R.G.W. Smith | Sound Recordist |
| Sound | Norman Demuth | Music |
| Art | George Haslam | Art Direction |
