The theft of an important document from the ambassador's residence leads his daughter to investigate the crime.
| Actor | Role |
|---|---|
 Miriam NesbittHelen, the ambassador’s daughter | Helen, the ambassador’s daughter |
 George LesseyRichard Farnsworth, an attaché at the embassy | Richard Farnsworth, an attaché at the embassy |
 Robert BrowerThe ambassador | The ambassador |
| MMarc MacDermottCharles Dumont, a clerk at the embassy | Charles Dumont, a clerk at the embassy |
 Bigelow CooperThomas Crompton | Thomas Crompton |
 Charles OgleForeign conspirator | Foreign conspirator |
 Mary FullerForeign conspirators | Foreign conspirators |