Stella Maris was a major advancement in filmmaking. Mary Pickford plays dual roles in a film that is very different from anything she had ever done before. It tells the story of two, very different young women; a beautiful, rich, but crippled Stella Maris and Unity Blake, a deformed and abused orphan. Director, Marshall Neilan, and cinematographer Walter Stradling created some trick photography for Mary to play both roles, using double exposure photography and complex editing which made it possible to present both characters on screen simultaneously.