A good man and his son are kidnapped by a bunch of bandits called 'Los Chacales'. Twenty years after, another band of 'banditos' (Los Plateados) terrorizes the region. The leader of 'Los Plateados', El Tigre (Ortiz), is the boy kidnapped 20 years before. El Tigre knows beautiful Dolores (Gallardo) and decides to conquer her... without knowing she's his long-lost sister.