He used to have a life. There were people he loved. But now this young man has lost it all. He was destined to wake up as an undead creature in a different world. Not a single memory of his previous life remains in his head. Did he even have anything to remember or was it just a fleeting dream? His body is eternally cold, and his new fate is to wander endlessly in a huge labyrinth. The only thing that keeps his undead body going is the unbearable, painful yearning for warmth.