During a weekend camping trip, longtime friends Damian, Nora, Andy and Joy are expecting to get close around the campfire. Until one morning a siren jolts them from their weekend fun into the killing spree of a nearby cult. A cult that believes in a spirit called "The Sarbande Spirits" who will grant them immortality and full immunity from all disease for each soul they take. The friends are forced to unleash their primal instinct to get out of the forest, but never know if the next step is towards a blade.

"When you hear the siren, run."