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.
| Directing | Budd Boetticher | Director |
| Writing | Paul Yawitz | Writer |
| Editing | Al Clark | Editor |
| Camera | L. William O'Connell | Director of Photography |
| Writing | Jack Boyle | Writer |
| Production | Ted Richmond | Producer |
| Sound | Paul Sawtell | Original Music Composer |
| Art | George Brooks | Art Direction |
| Art | Robert Priestley | Set Decoration |
| Directing | Milton Feldman | Assistant Director |
| Art | Lionel Banks | Art Direction |
| Sound | Lambert E. Day | Sound |
| Sound | Mischa Bakaleinikoff | Music Director |
| Crew | Gregory Stone | Additional Music |
| Crew | Earl E. Lawrence | Additional Music |
| Crew | Ben Oakland | Additional Music |
| Crew | Werner R. Heymann | Additional Music |
