Nelson Wright, brillant étudiant en médecine, réussit à convaincre quelques-uns de ses condisciples de l'aider à provoquer son propre arrêt cardiaque pour atteindre un au-delà qui, croit-il, pourrait lui donner quelques réponses sur la mort, et donc sur la vie.
Medical students begin to explore the realm of near death experiences, hoping for insights. Each has their heart stopped and is revived. They begin having flashes of walking nightmares from their childhood, reflecting sins they committed or had committed against them. The experiences continue to intensify, and they begin to be physically beaten by their visions as they try and go deeper into the death experience to find a cure.