Despite the title, the story does not take place on the Isle of Samoa, but on a supposedly uncharted island of the Pacific, the name of which sounds like Tongaluha.
American Film Institute Catalog of Feature Films, 1941-1950, credits actress Jacqueline de Wit with the role of "Pepita;" actually, she plays Marguerite, murdered wife of Nick Leach (Ben Welden), in the opening minutes of the film.