It is the year 1984. Sara Deureaux lives with her deeply religious, elderly parents in a rural area of Maui. Discouraged from building friendships in school, Sara leads a private and old-fashioned life. When the family receives an odd letter that announces the impending arrival of four mysterious, young cousins, Sara's life soon turns tumultuous. Trying to make sense of these peculiar children she forms a tenuous friendship with an unlikely pair: Jenny a newcomer to the island and Sunami, a tomboyish, local girl.
As they uncover clues about the children, a chilling truth begins to take shape. An insidious terror is sweeping through the valley where the girls live, threatening the lives of the community. In a race to discover the truth about who Sara's cousins really are and the secrets of her dark past, the girls realize to their horror that time is running out.
