Ambushed at their homestead by Sheriff Wydell and a squad of armed men, the Firefly family awakens with guns blazing-yet only Otis and his sister, Baby, manage to escape unharmed. Taking refuge and hostages in a back-road motel, the wanted siblings rendezvous with their deranged partner in crime, Captain Spaulding, killing whoever happens to stand in their way. But as the body count mounts higher, Sheriff Wydell decides to "cross the line" and take the law into his own hands, paving the way for one of the most depraved and terrifying showdowns in cinematic history.