When a chemical manufacturer is killed after asking detective James Wong to help him, Wong investigates this and two subsequent murders. He uncovers a international spy ring hoping to steal the formula for a poison gas being developed by the first victim's company.

Starring:

Boris Karloff , Grant Withers , Maxine Jennings , Evelyn Brent , George Lloyd , Lucien Prival , John St. Polis , William Gould , Hooper Atchley , John Hamilton , Wilbur Mack , Lee Tung Foo , Lynton Brent , Grace Wood

Genre:

Adventure, Crime, Drama, Mystery, Thriller