Brain chemistry research has produced a drug - Nirvana - that can wipe out addiction and mental illness by stimulating pleasure centers in the brain and flooding the brain with endorphins. PsyMax Labs is about to release Nirvana, but suddenly something goes badly wrong. Nirvana causes drastic genetic changes, switching on dormant genes to produce BRAINIAC, a creature whose need for the brain's pleasure chemicals causes it to begin eating human brains.

A young woman tries to cover up a deadly hit and run accident, only to have the supposedly dead victim come back to terrorize her.