Pasiones infernales (1966)

The daughters of the sun are women who meet the erotic needs of pearl fishermen on the island of Samoa. Marcia is the only one of these women who chooses to whom she gives her sensual pleasures. She rejects Mario, the richest man on the island, and falls for his son, Cándido. After he finds out, Mario seeks to jeopardize Marcia by all means to force her to make her his.