The Chinese prince T'Su Wong Shih loves Quan Yin, the daughter of a gardener, but his uncle wants him to marry a girl of his own class. Leaving to study in the United States, the young man promises his beloved that they two will be together soon. Having finished university, one day T'Su Wong Shih visits the market of San Francisco, and at an auction of slaves, he finds Quan Yin auctioned. To save ...