Ambushed at their isolated home by Sheriff Wydell and a squad of armed men, the Firefly family wakes up one morning under fire. Only Otis and his sister, Baby, manage to escape the barrage of bullets unharmed. Hiding out in a backwater motel, the wanted siblings wait to rendezvous with their errant father, Captain Spaulding, killing whoever happens to stand in their way. But as the body count mounts higher, Sheriff Wydell decides to take the law into his own hands, paving the way for a most depraved and terrifying showdown.