Chapter titles: 1. The Chinatown Mystery 2. The Clutching Claw 3. The Devil's Dice 4. The Mysterious Thirteen 5. Galloping Fury 6. The Depth of Danger 7. The Invisible Hand 8. The Wreck 9. Broken Jade 10. The Thirteenth Hour
Final Film of actress Peggy O'Day .
Producer Trem Carr was able to shoot this serial in part by renting several already-standing sets at Metropolitan Studios.