A ship carrying a touring circus troupe sinks at sea, and Lorraine, a young girl, is washed up on a deserted island. Her only companion is a gorilla from the circus, Bimi, who raises her as its own. Several years later Lorraine's wealthy grandfather, who has hired a psychic to help find her, is led by the psychic to Lo…

Traitorous California Senator tries to use the newly founded Pony Express to further his plans for a California Republic, but Unionist Frisco Jack will try to stop him.