The film centers on the Herdman kids, who are the absolute worst. They lie, they steal, they bully… and they’ve hijacked the town Christmas pageant. As the rowdy and raucous siblings force themselves into all of the lead roles, they drive the pageant’s director, Grace (Judy Greer), and other members of her family, including husband Bob (Holmes), up the wall. But through their misfit mischief, these unlikely messengers might turn out to be the ones to deliver the town’s sensational and moving portrayal of the true meaning of Christmas.

Will, a young Hispanic gay potter, is one gregarious guy. His boss is terrible, but he's got a great boyfriend and a great job. Unfortunately, behind that veneer is a dark past of violence and mental illness that he is desperate to keep hidden. When his bipolar mother comes out of the woodwork after ten years of silence, he begins exhibiting unexplainable symptoms. After an injury at work, he starts losing functioning of his arms, and something sinister lurks in the corner of his vision: a silent and ominous man in a wolf costume. Will spirals into an obsession, determined to solve this mystery of his own. What is going on with his arms? Can he trust his boyfriend? Is he becoming his mother?