The Silent One (1984)

A baby is washed up on a Pacific Island and is adopted by a childless woman. The tribal priest takes an instant dislike to the child, proclaiming him a demon. The child is deaf and mute and therefore excluded from hunting with the other young men. Out of loneliness, he befriends a white turtle. When a drought befalls the island, the priest blames the silent one. When the chief protects the boy, the priest plots the chiefs' downfall.