A group of six close college friends decides to celebrate their graduation with a private party. One of them, known for her love of marijuana, buys a hallucinogenic substance from her dealer, who ends up staying to party with them. Under the influence and confused, their celebratory evening soon spirals into a terrifying and chaotic ordeal filled with bloodshed. Fast forward five years, the friends reunite at a secluded cabin in the woods, aiming to revive their once-strong bond. However, they soon realize they are being pursued by an unknown entity or person.