Johnny Weissmuller takes writer Jean Byron into the jungle looking for a story for her new book. They and some men looking for diamonds are captured by a tribe of pygmies (the moon men) and taken to the temple of priest Helen Stanton. This is esentially a Jungle Jim film, but this time Johnny Weissmuller plays a character called Johnny Weissmuller. This is probably the worst of the Johnny Weissmuller Tarzan/Jungle Jim series of films.