Seo Won survived death only because of a heart transplant from a perfectly matched S-Class Esper. But that heart already carries someone else’s Imprint. To stay alive, he must find the Guide who engraved it — and bind them to his side by any means necessary. Cha Han-gyeom lost his Imprinter five years ago. Since then, he’s been selling his guiding ability underground, waiting quietly for the end. Then a man with ice-cold blue eyes and a heart burning with a familiar warmth appears before him. “Cha Han-gyeom.” He said the name as if tasting it — a name he was never told. Why does this stranger’s heart carry the Imprint that belongs to someone already dead? A story of obsession, survival, and a bond that transcends death.