When Hayabusa enters the Aqua Capital and faces off against a plethora of new enemies, he finds himself in an underground water system that leads to an eventual battle against a water dragon. After the battle, Hayabusa begins his ascent and finds himself in the home of Volf, the Greater Fiend of Storms. From the Lycanthrope's Castle, Volf amasses a major storm which puts the city in disarray.
Filled with enemies, Hayabusa fights his way to the center and confronts Volf, only for Volf to challenge Hayabusa to a duel at the Colosseum. From there Hayabusa fights his way back down the Castle for his confrontation with the Greater Fiend.