She seeks refuge in an underground bunker, only to discover that it is the lair of deadly, mutated creatures—half-human, half-demon—that have been created through a secret military experiment.

As the creatures begin to hunt her and a small group of survivors, Kate must use her survival skills to fight back against the horrifying monsters and escape the deadly situation.

The film combines elements of military action, horror, and supernatural creatures, focusing on the themes of survival, combat, and confronting monstrous forces.