In medieval Japan, eight-year-old Hojo Tokiyuki is the heir to the Kamakura shogunate. But the Hojo clan is in decline, and Tokiyuki's peaceful days of playing hide-and-seek with his teachers come to an abrupt end when his clan is betrayed from within. The lone survivor of his family, Tokiyuki is the rightful heir to the throne, but to take it back, he'll have to do what he does best--run away!

The monstrously powerful Toki Yorito, who serves the Ashikaga, has brought his force to engage with Akiie's army. His human bombs devastate Akiie's troops, and even Tokiyuki's retainers have trouble stopping him. The march on Kyo continues as more of the Ashikaga troops deploy to defend the capital. Then Tokiyuki must face a former friend when Fubuki returns to send Tokiyuki on a journey to the Underworld!