In a world gone mad, the last human colony struggles to survive underground, beneath a land of nightmarish mutants who seek to destroy them. But when the mutant breaks inside humanity's final stronghold, the battle for survival pits the human colonists against their deadly invaders miles below the earth's surface.
The main character and his dog from the first movie make it halfway through this sequel and then while he is away the dog is killed protecting a women, it's quite distressing to watch, and when he returns he finds the dog with it's throat cut :(