The Onoe Conglomerate in Hakodate, Hokkaido receives a warning letter from Kid the Phantom Thief. His target: a historical Katana once owned by Hijikata Toshizo, vice commander of the Shinsengumi. As Conan and Heiji try to foil Kid's plans, a body is found! Murdered by a sword with a cross-shaped wound... This murder, the historical katana, and rumors of a weapon so powerful it could change the outcome of a war... A mysterious swordsman holds the key to this mystery!
