The dilapidated bus shuttles through the fog, and the protagonist is forced to embark on a journey of gambling with his life. He can only survive by passing through the cold trick doors, breaking into heart-breaking and bone-crushing copies, and completing tasks amidst unsolvable fears and deadly traps. While struggling to survive in a twisted dungeon, he has to weigh and deal with ulterior friends, explore the truth in the fog of a strange world, and repeatedly pull between reality and the abyss. Every step he takes steps on the edge of the abyss. Every time he travels, there is an unknown murderous intention. Behind the trick door, there is endless darkness and the only chance of life.
