John Crenshaw is a former soldier in the US Navy. One weekend, John decides to accompany his girlfriend and its students in a photographic expedition. The expedition takes place in a vast forest. When the group begins to be chased by a horde of bloodthirsty mutants weekend educational quickly turns into a fight for survival. John is forced to return to the life he left her behind and become a soldier fighting to eliminate mutants. The hunters become the hunted shortly in this game of cat and mouse as John is capable of anything to save his girlfriend.