A man who spent four years in prison for a crime he didn't commit wreaks havoc with the man who framed him and stole his girl.

In turn-of-the century Africa, colonial traders driven by greed brave forbidding dangers to exploit the continent's vast treasures. One of these is sea captain Marlow, who penetrates the Congo's jungles in pursuit of the mysterious Mr. Kurtz, deranged chief of a remote trading station.