Lucy Hegan, the proprietor of a settlement house for the poor, is engaged to Hugh Gordon, the head of a large pharmaceutical and chemical firm who, unknown to Lucy, is also the ringleader of a powerful drug and white slave operation in the Chinese quarter.
| Actor | Role |
|---|---|
 Robert McKimHugh Gordon | Hugh Gordon |
 Claire AdamsLucy Hegan | Lucy Hegan |
 Betty BriceMaggie O'Brien | Maggie O'Brien |
 Roy StewartAllan Martin | Allan Martin |
 George WebbMonk Mullen | Monk Mullen |
 Edward Peil Sr.Ling Choo Fong | Ling Choo Fong |
 Harvey ClarkChow Chin | Chow Chin |
 Harry TenbrookChink Murphy | Chink Murphy |
 Stanton HeckGeorge Conley | George Conley |
 George HernandezJames Hegan | James Hegan |
 Gertrude ClaireMrs. Mullen | Mrs. Mullen |
| AAudrey ChapmanMary Holmes | Mary Holmes |
| ZZack WilliamsWesley Shiloh Mainwaring | Wesley Shiloh Mainwaring |
| LLaddie EarleJimmy Mullen | Jimmy Mullen |