A group of teenagers ventures into a remote forest for a weekend of adventure. They encounter an eerie, foreboding atmosphere as they set up camp, but their initial excitement drowns out any concern. As night falls, strange occurrences disrupt their fun, including the discovery of mysterious alien discs that seem to have a life of their own. Panic sets in as the group realizes they are being hunted by an unseen force. Seeking help, they stumble upon Joe Taylor, a reclusive hunter who has witnessed the sinister presence before. Joe's expertise and dire warnings about the alien threat align with the teenagers’ growing fear and desperation.

As Joe and the teenagers strategize on a plan for survival, they are reluctantly joined by Fred "Sarge" Dobbs, a distraught Vietnam War veteran who has also encountered these extraterrestrial dangers. Racing against time, tension rises as the group tries to evade the relentless alien predator while dealing with internal conflicts and mistrust among themselves. The narrative builds suspense as outsiders become allies, and each character’s endurance is tested. As calamity looms larger, the stakes become a matter of life and death, escalating to a nail-biting climax that defines their fate against the extraterrestrial menace.