Lydia (Erin Moriarty) buys bullets at a megastore for her boyfriend Jonah (Diego Luna) and his gang. After loading up, the gang goes to kill a tenant family who apparently stole money stashed in the walls of their rented house. After killing a tenant, Jonah ties up another and asks Lydia to kill her. However, Lydia accidentally shoots Jonah in the neck, apparently killing him. She escapes the crime scene and contacts her father John (Mel Gibson), an ex-convict and former alcoholic out on parole after serving seven years in prison. He picks up Lydia, takes her back to his trailer house, and learns that she is habituated to drug addiction and alcoholism. Some days pass by uneventfully, although Lydia receives death threat messages from the gang members.