Sei devotes herself to becoming an ideal bushi, or warrior, and accompanies the Mibu-Roshi to Osaka. There, she finds the man responsible for killing her father and brother. Desperate to avenge her family, Sei uncovers his hideout with the help of a friend, but they are soon discovered and her companion is slain. Is Sei ready for the hardships of the Mibu-Roshi? Or should she return home to lead the life of a normal girl?