A European royal couple come to New York to sell some of the royal family's crown jewels. A gang of international jewel thieves is planning to steal the gems, so a private detective is assigned to guard them. Unfortunately the private eye turns out to be a bumbling, inept fool--or so everyone thinks.
| Actor | Role |
|---|---|
 Ed WynnHomer Thrush | Homer Thrush |
 Thelma ToddPrincess Aline | Princess Aline |
 Chester ConklinTennyson Hawks | Tennyson Hawks |
| RRobert AndrewsTom Raymond | Tom Raymond |
 John HarringtonGrogan | Grogan |
 Bradley BarkerGentleman Joe | Gentleman Joe |
| AArmand CortesThe Ray | The Ray |
 Ruth DonnellyFanny Pratt | Fanny Pratt |
| MMario MajeroniPrince Zibatchefsky | Prince Zibatchefsky |
 Truly ShattuckMrs. P. Belmont-Fox | Mrs. P. Belmont-Fox |