During World War I, a group of German saboteurs plot to blow up an ammunition dump in New York City. A secret agent sets out to stop them.
| Actor | Role |
|---|---|
 Irene CastleSylvia Carroll | Sylvia Carroll |
 J.H. GilmourVan Brunn | Van Brunn |
 Elliott DexterCurtis Prescott | Curtis Prescott |
| SSuzanne WillaFay Walling | Fay Walling |
| JJ.W. PercivalJohn W. Homing | John W. Homing |
 Erich von StroheimPeter | Peter |
 Macey Harlam(uncredited) | (uncredited) |
 Antonio Moreno(uncredited) | (uncredited) |