Revolutionaries rise up against the Mexican government in California in 1841 is told through the story of doomed Mexican general Don Francisco Hernandez (Michael Pate), who pits his troops against a tenacious team of revolutionaries led by his half brother, Don Michael O'Casey (Jock Mahoney). Susan Seaforth Hayes co-stars as Marianna De La Rosa, an heiress pledged to marry the ruthless Don Francisco even though she secretly loves Don Michael in this 1963 historical adventure.