After a rare gem is stolen from an exhibition at a posh hotel, Inspector Farraday decides to recruit former thief Boston Blackie to find the stone. Along with his assistant, "The Runt", Blackie focuses his investigation on the hotel manager, George Daley, and his sister, Eileen. Through disguises and ruses, Blackie and the Runt try to trick their way to discovering the thieves.
| Production | Ted Richmond | Producer |
| Camera | L. William O'Connell | Director of Photography |
| Directing | Budd Boetticher | Director |
| Writing | Jack Boyle | Writer |
| Writing | Paul Yawitz | Writer |
| Editing | Al Clark | Editor |
| Art | Robert Priestley | Set Decoration |
| Art | George Brooks | Art Direction |
| Directing | Milton Feldman | Assistant Director |
| Sound | Paul Sawtell | Original Music Composer |
| Art | Lionel Banks | Art Direction |
| Sound | Lambert E. Day | Sound |
| Crew | Earl E. Lawrence | Additional Music |
| Crew | Gregory Stone | Additional Music |
| Sound | Mischa Bakaleinikoff | Music Director |
| Crew | Werner R. Heymann | Additional Music |
| Crew | Ben Oakland | Additional Music |
