Five medical students, obsessed by what lies beyond the confines of life, embark on a daring experiment: by stopping their hearts for short periods, each triggers a near-death experience - giving them a firsthand account of the afterlife.

A group of high school students form a coven of witches.

Five medical students experiment with "near death" experiences, until the dark consequences of past tragedies begin to jeopardize their lives.

A newcomer to a Catholic prep high school falls in with a trio of outcast teenage girls who practice witchcraft, and they all soon conjure up various spells and curses against those who anger them.

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.