Eight teens are dropped off on a remote west-coast island for a week-long treatment program called INTRO (Into Nature to Renew Ourselves). The story is told by two of them: Alice, whose police-officer mother believes Alice might have a substance-abuse problem, and Caleb, who assaulted his abusive stepfather. They are joined by six other miscreants and three staff: a psychologist, a social worker and an ex-cop. On the first...