Conan, Ran, and Kogorou go to the mythical village of Izumo. there they meet Eiko Ezumi, an employee at the Grand Shrine, and learn that she is to marry a rotten businessman, Kouji Wanibuchi - founder and president of his own company. Later they meet her childhood friend, Ryousuke Fukuma and it comes to a rocky start when Kogorou yells at him. The next day, Eiko's fiancee is found dead with his Sword of the Eight-Headed Snake he was carrying goes missing.