In 1868, a battle between new government forces and shogunate forces are about to take place in Edo. Katsu Kaishu (Hiroshi Tamaki) wants to avoid useless bloodshed and sends a peace envoy to Takamori Saigō, but Katsu Kaishu is unable to get a response from Takamori Saigō. One day, Katsu Kaishu meets high school teacher Mikako (Satomi Ishihara) and her student Masaya who is captivated by the shogunate. Mikako and her student Masaya tells Katsu Kaishu that they are from the future. Katsu Kaishu takes care of Mikako and her student Masaya, while Mikako hopes to go back to the future where she came from.
Akira Kurosawa’s lauded feudal epic presents the tale of a petty thief who is recruited to impersonate Shingen, an aging warlord, in order to avoid attacks by competing clans. When Shingen dies, his generals reluctantly agree to have the impostor take over as the powerful ruler. He soon begins to appreciate life as Shingen, but his commitment to the role is tested when he must lead his troops into battle against the forces of a rival warlord.