A young girl, Mary Tillet, is forced to find a new place to live due to her London home being bombed during World War II. Her tobacconist landlord, Jack Rawling, tries to help her turn her new apartment into a home. Meanwhile the newspapers are reporting news of the "London Blackout Murders," a murder spree being committed against a ring of suspected Nazi spies, and Mary must determine if her kind landlord is an assassin.
| Writing | Curt Siodmak | Screenplay |
| Directing | George Sherman | Director |
| Editing | Charles Craft | Editor |
| Production | George Sherman | Producer |
| Sound | Mort Glickman | Original Music Composer |
| Camera | Jack A. Marta | Director of Photography |
| Art | Russell Kimball | Art Direction |
| Art | Otto Siegel | Set Decoration |
| Directing | Arthur Siteman | Assistant Director |
| Sound | Morton Scott | Music Director |
| Sound | Arthur Morton | Orchestrator |
| Sound | Walter Scharf | Original Music Composer |
