A decade after abandoning her three best friends, Paige gets word that one of them has died under mysterious circumstances, forcing her to face the past.
Paige arrives to find her hometown is literally being swallowed by nature, with its few remaining inhabitants unhinged and in the grip of a strange psychosis.
Paige discovers her friends are using - and dealing - the strange new drug responsible for the town's mania. Did they manipulate her into coming home? And could they be thwarting her attempts to leave?
In an effort to piece together what happened while she was away, Paige agrees to a hangout session that turns sinister when her friends force open the door to her higher consciousness.
The group makes a pilgrimage to the abandoned high school where nature has recycled the violence of the past into a living nightmare. The true motive behind engineering Paige's homecoming is revealed.
Paige goes on the offensive in a bid to stop her friends and save what's left of the town. All while battling her own demons and dangerous hallucinations.