Having picked up a book forgotten by a neighbor, Denka had no idea how this would turn out for her. If she had known that a strange discovery would open the door to an unknown world, that book heroes would begin to enslave their acquaintances, and that she herself would soon be driven into a trap... Of course, she would have taken the tenth route around the find! But it’s too late to retreat - the dark forces have thrown a challenge, and Denka will have to accept it.