This book is a Japanese contemporary novel, Book VIII of Spice and Wolf series. In order to collect intelligence about the wolf bone, Lawrence and his party arrived at Kilby where the north confronted the south because of the land disputes. The legendary Marine Mammals, narwhal was shipped to a local port, whose high value might even reverse the local power relations. A commotion set off in Kilby and Lawrence and his party also felt the turbulence in the air. The businesswoman, Ifver, who attempted to loot the narwhal, proposed Lawrence to exit Ron Business Association and turn to cooperate with her. Lawrence got into panic and then received a letter from the Association for his assistance.