Number Three Son Tommy comes to the aid of a damsel in distress - by offering Charlie Chan's services - in this "top-notch whodunnit fare" (Variety) starring Sidney Toler and Benson Fong. LeahManning (Joan Woodbury) has never stopped searching for her father's murderer, although the police and the DA gave up long ago. And now, to add insult to injury, an "expert criminologist" has writtena "novel" accusing her mother of the crime! Charlie's investigation leads him to a cutthroat gang of gem thieves out to steal a wealth of diamonds hidden in a porcelain Chinese cat!