In the early 1970s, when everyone in America was worrying about Vietnam, the United States army was secretly developing a way to reanimate the dead. The hope was to have the dead fight their war, but the experiments were shut down when the reanimated corpses were unable to control their hunger for human flesh.

Thirty years later the army has decided to reopen the project in Grover City, as the home to their main testing facilities. Without warning, the experiments go awry and the dead are now on a rampage, eating every person in sight. With the town overtaken by zombies, a group of high school seniors take it upon themselves to fight the undead through swamps and forests to find a cure for this deadly epidemic.