Two beachcombers with a yacht join woman-with-a-past Rita on a quest for black pearls on a secret island. Arrived, they find another white man has made himself high priest; but George, the latter's handome son, is fair game for Rita, who lands in the guise of a missionary! The inevitable conflict over the pearls brings violence and corruption to the quiet island.

"'What's one more sin! when there's a fortine to share?'"