Dr. Dudley Duprez is a well-known Louisiana physician. His beautiful but wayward niece, Rose Duprez, is abducted by Paul Crenshaw, a friend of the doctor, and to prevent her shame from becoming known, Rose kills herself. Dr. Duprez learns her secret and determines to make Crenshaw expiate his crime. While traveling on a Mississippi River steamer, the doctor wins Mercedes, a beautiful slave, at cards. He takes her home and, passing her off as a distant relative, arranges it so that Crenshaw falls in love with the girl.
| Actor | Role |
|---|---|
 Frank KeenanDr. Dudley Duprez | Dr. Dudley Duprez |
 Margery WilsonMercedes Mendoza | Mercedes Mendoza |
 Jerome StormPaul Crenshaw | Paul Crenshaw |
 David HartfordJudge Shone | Judge Shone |
| EElvira WeilRose Duprez | Rose Duprez |
| FFlorence HaleMammy Lou | Mammy Lou |