After one dreadful incident you find yourself again in hell. You're not able to remember the incident - the reason why you're in hell; generally you don't remember much from your human life but you know one thing for sure: you haven't been evil all your life and so you can't understand why fate had decided to put you in hell with your babysitter called Hoseok. He's the demonic punisher assigned to you but somehow you're able to touch his crumbled and darkened soul. He decides to help you remembering, neglecting his actual tasks, which follows severe consequences.