The first full-length adventure from Gosho Aoyama, the legendary creator of Case Closed! Yaiba Kurogane is an energetic young swordsman who's grown up training to be a samurai in the jungle with his father, Kenjuro. When they return to Japan, chaos seems to follow wherever Yaiba goes! Destined to be a legendary hero, Yaiba must learn to be a true samurai and save the world! While Yaiba and Onimaru battle it out, a new enemy appears--Kaguya, the Moon Princess! Armed with fearsome power and a thousand-year-old grudge, Kaguya sets her sights on Yaiba, who has inherited the spirit of the Dragon God. A three-way battle begins between Yaiba, Onimaru, and Kaguya. If Kaguya can sideline Onimaru, she'll turn her attention to Yaiba and the Dragon God while her minion, Mangetsu, hatches a plan to flood Tokyo! When Kaguya finally reveals her true form, it's scarier than anyone could have imagined!