The shadowy Ying Ko confronts Tong evil in San Francisco's Chinatown in two exotic pulp novels by Walter B. Gibson. First, The Shadow navigates the perilous mazes of Chinatown to destroy the deadly "Teeth of the Dragon" in the action-packed thriller that introduced the mysterious Myra Reldon. Then, a young woman's purchase of the "Jade Dragon" of Tsai Hsun leads to serial murders that lead The Shadow through the deadly streets of Chinatown in search of tong killers.