Young cavalry officer Jeff Stewart returns to his home in the west after the Civil War to find that a ring of crooked politicians has taken over the county, bleeding the citizens with 50% of value on the main trail, and protecting the rustlers that raid the cattle ranches. With the permission of the state governor and the assistance of Kate Wells, the postmistress, Jeff plans to open another trail to beat the toll. He also decides to resurrect an ancestor of his who, in a similar situation, took the law in his own hands-----Zorro. With the aid of Pancho, Zorro manages to thwart the conspirators and exposes the guilty culprits.