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!