In a hostile, dystopian world, a young boy flees through a forest while masked guards pursue him with flashlights, vehicles, and attack dogs.

After escaping the patrols, he crosses farmland overrun by parasitic worms and rampaging animals, then reaches a seemingly abandoned city where zombie-like people are moved through mind control. Using a mind-control helmet, he manipulates these drone-like figures to press deeper into a vast underground facility.

Inside flooded chambers and laboratories, scientists conduct disturbing underwater experiments on human bodies. An underwater creature attaches a device to the boy, allowing him to breathe beneath the surface as he continues toward something at the center of the complex.