In the icy darkness of a ruined universe, a soul named Lin Yao awakens in despair, only to discover that he is trapped inside the most infamous body in the cosmos: Ultraman Belial. What drives him is not a desire for destruction, but a cold and merciless Villain System. Using the safety of the only people Lin Yao cares about in his original world, his family, as leverage, it forces him to play the part of a true villain: steal energy, stir up conflict, disrupt order… all so he can return to his family.