Desperate for a break from big city life, Emma heads to her family's cabin deep in the Arkansas hills. As she settles in for some much-needed R&R, she learns that something unspeakable lurks in the surrounding darkness. As the full moon rises, a bloodthirsty werewolf emerges from the shadows, slaughtering everyone in its path and revealing a sinister underworld Emma never knew existed. Thrown into a fight for her life, and her very soul, Emma will need to escape these big bad woods before it's too late.

Students on summer break are exposed to a deadly virus that is spread rapidly through direct human contact. The infected become enslaved by the invading "swarm" intelligence and driven by an insatiable appetite to consume human flesh. Returning home, the students spread the infection to their fellow classmates and other unsuspecting townspeople.