Government Agent Conway, posing as a crew member of a ship, is investigating the flood of counterfeit money that seemingly is originating for a gambling ship, moored off-shore beyond the three-mile limit and operated by gangster Dave Reeves.
| Actor | Role |
|---|---|
 Jack HoltTreasury Agent Conway | Treasury Agent Conway |
 Harry CareyCaptain Bailey | Captain Bailey |
 Sig RumanVan Cleve | Van Cleve |
 Eduardo CiannelliDave Reeves | Dave Reeves |
 Donald BriggsJimmy Rothaker | Jimmy Rothaker |
 Irene WareDorothy Kenney | Dorothy Kenney |
 Dick PurcellAgent Melvin Pierce | Agent Melvin Pierce |
 Ben WeldenLefty Shores | Lefty Shores |
 Paul FixBill Swanson | Bill Swanson |
 George J. LewisEd Morrow | Ed Morrow |
 Harry HarveyGambler (uncredited) | Gambler (uncredited) |
 Kathleen HowardSocialite (uncredited) | Socialite (uncredited) |
 John WrayShip's Captain (uncredited) | Ship's Captain (uncredited) |