Um monstruoso morto-vivo causa uma chacina entre um grupo de campistas que perturbaram seu túmulo.

Mercenaries with nothing to lose are hired to rescue a bioengineer imprisoned in a cold war bunker. Upon entering the ominous facility, they find themselves in a fight for their lives when they come under attack from an unknown and deadly creature.

Joshua must protect his twin-sister, Emma, who possesses supernatural abilities and keep her safe from an unstoppable secret agent hunting them for an experiment in a classified government program.