When a good-for-nothing man named Dan is stabbed to death and his arm broken, Charlie Chan is on the case. His first clue comes from the victim's sister, who noticed a prowler wearing a glow-in-the-dark wristwatch.

• Fox Film Corporation
• Warner Oland
• Heather Angel
• Roger Imhof
• John Warburton
• Walter Byron
• Ivan F. Simpson
• Virginia Cherrill
• Francis Ford