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 her, he agrees to pay a price of five thousand dollars but, not possessing the full amount, he makes a deal with the auctioneer for a three-year extension in which he must work to raise the money needed to rescue the girl. T`Su Wong Shih has no great success until he manages to win a large sum in a lottery. However, Quan Yin is now in danger because a Chinese gangster wants to have it and, to do that, goes to threaten the auctioneer who is forced to comply.