Throughout history, famous authors have been reborn by a mysterious, invisible creature known as the Alchemist. They are tasked by the Alchemist to jump into books to purify the pages of creatures known as Taints, with their souls contained and chained to a vast library. Along the journey, they must also rescue and recruit fellow authors who have been trapped within the novels they have penned. Although the authors take on new and strong forms for this attempt, some retain a semblance of their former selves, while others struggle to recall their pasts and the works they had written. Despite the fact that there is no obvious conclusion to their big objective, they stay dedicated to it in the hope of unraveling the mystery underlying their collective.