Psychiatrist Jane Van Dopp (Carice Van Houten, Black Book) has been appointed by the court to travel to a remote island off the Irish coast to work on the case of Dorothy Mills (Jenn Murray, TV’s Day of the Triffids), a teenage girl who has been accused of molesting and trying to kill a young baby. After miraculously surviving a car accident, Jane discovers an unwelcoming, deeply religious community mostly ruled by Pastor Ross (Gary Lewis, Goal!, Ae Fond Kiss, Gangs of New York). She meets a very nervous Dorothy, who swears she never touched the baby, and after analyzing her, Jane soon begins to suspect that Dorothy has developed a multiple personality disorder.
But as the days unfold and the community is darkened by strange events, Jane quickly comes to realize that what is affecting Dorothy may have something to do with the supernatural…