This book is a Japanese contemporary novel, Book VII of Spice and Wolf series. In Roma River, Lawrence and his party learned of the hearsay of the foot bone of the wolf God and the church seemed to want to show off its authority with it. After hearing that the foot bone may belong to their kind, Heluo, of course, was impossible to ignore the event. In order to obtain more detailed information, they decided to go to the port town, Kilby, to wait the businesswoman, Ifver.