Blanche Sweet has a dual role in this picture -- she plays twin sisters, Edith, a sweet, normal young girl, and Grace, who is a drug fiend. They live in poverty with their parents and their father (Hal Clements) finally finds work. Because he is faithful to his boss (Thomas Meighan), he is offered a partnership.


The Secret Sin (1915)
A Vital-Throbbing Drama in Which Miss Sweet Plays Dual Roles
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Blanche Sweet
Edith Martin / Grace Martin

Alice Knowland
Mrs. Martin

Sessue Hayakawa
Lin Foo

Thomas Meighan
Jack Herron
HC
Hallie Clements
Dan Martin