The Parasite (1925)

Arthur Randall becomes prosperous after divorcing his wife, Laura, and she now attempts unsuccessfully to win him back. Randall's son becomes ill, and he engages Joan Laird and her mother to care for the boy. Society misunderstands, and Joan is branded as a parasite. Laura kidnaps the boy, Bertie, and Joan gives chase. Laura's car goes over a cliff, and she is killed. Bertie survives the crash, however, and he and Joan attempt to find their way to a refuge. They become lost in the hills, and Joan manages to keep Bertie from dying until rescue comes.