Sheriff Dallas saves bad man Jack Ripley from jail to track down the head of a ring smuggling Chinese across the border. Ripley falls in love with two-timing Ching, an American girl, raised by Chinese, rescues scar-faced Dong for her, only to have him kidnapped. He captures his boss, Lancaster but Ching effects his escape; finally rescues Dong again, unmasks the top man and sees a new shipment of Chinese wreck the gang. A lushly written western-advernture.