River of Diamonds (1990)

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In this adventure a treasure hunter sets off to dangerous Mercury Island in search of a fabulous underwater treasure. The explorer is a free-lance surveyor who goes there with his lovely girl friend. Once upon the island they must earn the trust of an enigmatic fellow, deal with an active volcano,… More In this adventure a treasure hunter sets off to dangerous Mercury Island in search of a fabulous underwater treasure. The explorer is a free-lance surveyor who goes there with his lovely girl friend. Once upon the island they must earn the trust of an enigmatic fellow, deal with an active volcano, Nazis, and a curse. ~ Sandra Brennan, Rovi