When investigating the death of a chemical manufacturer, detective James Wong (Boris Karloff) uncovers an international spy ring! In the first of a popular movie franchise from Monogram Pictures, director William Nigh unfurls an intriguing mystery headlined by a cast that includes Grant Withers, Maxine Jennings, and Evelyn Brant. What's not to love when a movie includes a crafty detective, secret formulas, and poison gas?