Don Luis a l'intention d'annoncer lors de la fête des moissons les fiançailles de son fils Andre avec Isabella, la fille d'un propriétaire voisin. Mais Andre prévoit de s'enfuir avec Erolinda, la fille de Vargas, l'intendant du ranch. Vargas les surprend et, croyant que sa fille est déshonorée, tire sur Andre. Ses vaqueros, le croyant mort, veulent se venger mais Erolinda les retient. Andre embrasse Erolinda, la proclamant ainsi comme sa fiancée.
As recorded in a film magazine, Maggie, the daughter of Pat Gallagher, a brutal saloon keeper, to escape from being forced into a marriage with a bully and protégé of her father, takes refuge in a shop in Chinatown that is just around the corner from her father's resort. The Chinese merchant Hop Woo, who has given her shelter, at last persuades her to marry him, resulting in a repugnant life for her. Years later finds Hop Woo the merchant selling his daughter Ah Woo into slavery. Ah Woo's brother, overhearing his father bartering with the highbinder, who is a member of the powerful Hip-y-tong society, runs for help to Jack Donovan, who keeps a gambling hall on the border of Chinatown. The brother shoots and kills the slave trader. Hop Woo is suspected of the crime and visited with blood atonement by the Hip-y-tong. The brother and Donovan, who loves the Chinese-American girl, rescue her from an underground passage below Chinatown, and Donovan shoots dead the highbinders. Maggie the mother has committed suicide. Donovan sells the gambling hall and buys a ranch, where he takes his bride Ah Woo and her brother.