William Warner is a lawyer who is famous for his skill at opening any kind of lock, making him a valuable commodity. William is unknowingly enlisted by German spies who want him to open a chest containing a secret formula. This leads to a madcap adventure involving spies, the police and lots of picked locks!
| Actor | Role |
|---|---|
 Edmund LoweWilliam Warner | William Warner |
 Janis CarterMyra Warner | Myra Warner |
 Robert B. WilliamsMalloy (as Bob Williams) | Malloy (as Bob Williams) |
 Richard HaleJohn Heyser | John Heyser |
 Stanley ClementsTuffy | Tuffy |
 Tom KennedyWatchman (uncredited) | Watchman (uncredited) |
 Kaye DowdSecretary (uncredited) | Secretary (uncredited) |
 Dusty AndersonBeautiful Girl (uncredited) | Beautiful Girl (uncredited) |
 Harry 'Snub' PollardWitness (uncredited) | Witness (uncredited) |
 Carole MathewsNot listed | Not listed |