As Ben (Lucas Hedges) enters his mother’s house on Christmas Eve, she shows her joy. Holly (Julia Roberts) and her daughter Ivy (Kathryn Newton) are aware he is struggling; he's a drug addict who has only managed seven days of sobriety. A pleasant Christmas celebration seems possible if he can maintain his abstinence, but his former dealer interferes, using the boy’s dog to lure him into one final job that sets off a…