The moment Lee Hyun launched the legendary horror game [Unreality], he was instantly dragged into its world. Awakening inside a darkened school in the dead of night, he encounters a mysterious high school girl named Dayeon. In this world, there is only one way to survive: solve the macabre puzzles and uncover the hidden rules governing the game. Will the two of them be able to clear this nightmare of a death game and return to reality?