A group of medical students decide to explore the afterlife, by making their own hearts stop and then being brought back to life by the others in the group. As their heartbeats stop, they begin to have flashes from their childhood, forgotten memories and sins they have once commited. What they had not expected is that these visions would not just haunt them while 'dead', but also follow them back to the realm of the living, where it can hurt them in more ways than one...