"Old San Francisco" (1927) An Alan Crosland Photoplay

Chris Buckwell, cruel and greedy czar of San Francisco's Tenderloin District, is heartless in his persecution of the Chinese, though he himself is secretly a half-caste, part Chinese and part European. Buckwell, eager to possess the land of Don Hernandez Vasquez, sends Michael Brandon, an unscrupulous attorney, to make an offer. Brandon's nephew, Terrence, meets the grandee's beautiful daughter, Dolores, while Vasquez refuses the offer. Terry tries to save the Vasquez land grants, but when Chris causes the grandee's death, Dolores takes an oath to avenge her father. Learning that Chris is half Chinese, Dolores induces his feeble-minded dwarf brother to denounce him; he captures her and Terry, but they are saved from white slavery by the great earthquake of 1906 that kills the villain.