Dr. John Benton the famous explorer, collapses and dies right in the middle of a lecture on his recent expedition to the Mongolian Desert after he drinks from a water bottle. Chinese detective Jimmy Wong and Captain Street of the police department have only one: hs last words “Eternal Fire.” Benton’s secretary Win Lee reveals the doctor’s dying words refer to a scroll which tells the location of oil deposits. Therefore, Wong and Street begin to look for the killer among Benton’s associates.
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