Monsters is a story about the young samurai Ryuma (a Zoro prototype) who aims to be the strongest swordsman in the land, a mysterious knight and master fencer Cirano and a legendary horn which can summon a dragon. Ryuma is very powerful samurai from the country of Wano. His name became legendary when he killed a dragon in one hit. Dr. Hogback eventually found his corpse, and reanimated it using Brook's shadow.