What if you could glimpse the afterlife and return to tell the tale? In this gripping sci-fi thriller directed by Niels Arden Oplev, five ambitious medical students, led by the fiercely determined Courtney, played by Ellen Page, embark on a dangerous experiment to explore the mystery of consciousness beyond death. Alongside her are Diego Luna, Nina Dobrev, James Norton, and Kiersey Clemons, each with their own personal reasons for tempting fate. By intentionally stopping their hearts to induce brief clinical death, they believe they are pushing the boundaries of science. However, when they are successfully resuscitated, they begin to experience haunting and inexplicable phenomena. Their thrilling quest for knowledge soon descends into a terrifying fight for survival as they are forced to confront sins from their past that have returned with them from the other side. This chilling exploration of guilt and consequence blends psychological horror with high-stakes medical drama, creating a suspenseful atmosphere where every heartbeat could be their last.