Colonel John Reynolds is working on a top-secret government project aimed at reanimating the dead for military purposes. His teenage son, Curt, and Curt's girlfriend, Julie, stumble upon the experiment and witness the horrific results. After an argument with his father, Curt and Julie leave, but they get into a motorcycle accident that kills Julie. Distraught and desperate, Curt sneaks back into the laboratory to use the experimental gas to bring her back to life.

Julie is resurrected, but she begins to undergo a terrifying transformation. Confronted with an insatiable hunger and uncontrollable rage, she attempts to quell her gruesome impulses through increasingly extreme and self-destructive measures. As Curt and Julie flee from authorities and try to cope with her deteriorating condition, they encounter obstacles and threats that challenge their love and survival. Pressed by time and desperation, Curt must decide how far he is willing to go to save Julie from her monstrous fate.