Emet is already over seventy. He lives out his life, carrying with him everywhere a creepy ancient book that he inherited from his father. "Gremula" is the name of this book, and it was kept by Emet's family for many generations. As far as the old man knew, with its help you can summon demons and do incredible things, but Emet himself, like most of the inhabitants of the kingdom, did not really believe in any evil spirits. Until a stranger took possession of the book and called the creatures of other worlds into the world.