Five hundred years ago, they were lovers. Five hundred years later, they still fell in love at first sight. He had already become a rotting corpse, but due to unfinished fate, he woke up in modern times and became an immortal zombie. He is an extremely handsome zombie. His existence came for her, and his awakening was only to break the shocking conspiracy. But are they sure they are really living in the real space? Or outside this world, another five hundred years later, a new him is spying on what happened five hundred years ago, and what does he want to change?