Grimoire. A book that, according to legend, can distort time and space at the request of the one who finds it. Many people dream about it, but only a few are looking for it. And he, Elin Noir, the absolute and master of the runes, who too often flirted with the dark side of his power, was the first to achieve success. At least, he thought so when he opened his eyes not in the body of an eighty-year-old man whom the whole world feared, but in the frail little body of a fourteen-year-old self, a carefree teenager, who then had no idea what trials would befall him. Only now Elin, who has already lost everything once, is ready to fight for his happiness. Even if this requires turning the universe upside down.