Choi Kwon is haunted by nightmares and cursed to watch those he cares about face tragic fates. Wracked with guilt, he isolates himself, until one day he decides to take a chance - only to see his classmate get hit by a car right in front of him. Though Shin Yooyoung survives, he now claims they were married in a past life and that breaking this curse is within Kwon's reach. Faced with a strange new reality, Kwon must decide what to believe and just how far he'll go to end his torment.