In the middle of a pictorial lecture on his recent expedition to the Mongolian Desert, Dr. John Benton,the famous explorer, drinks from the water bottle on his lecture table, collapses and dies. His last words "Eternal Fire" are the only clue Chinese detective Jimmy Wong and Captain Street of the police department have to work on.

Cast:Keye Luke, Lotus Long, Grant Withers, Charles Miller, Huntley Gordon, Virginia Carpenter,

Genre:Crime, Mystery, Thriller,

country:United States of America,

Production:Monogram Pictures,