A divorced husband and wife reunite to fight the release of their daughter's murderer.

After his devastatingly fast, samurai-style combat approach sets filmmakers against him, a legendary action star films his own movie—on turf claimed by feuding yakuza gangs, including Japan’s deadliest martial arts assassin.

Students, including Aoi Nishino, take part in class and sports activity at a prestigious high school. Aoi Nishino is a member of the school's archery club. He practices archery studiously and doesn't socialize much with the other students. His childhood friend Haruka Seno is also a member of the archery club, but she worries about Aoi Nishino. One day, thunder strikes the school grounds. After that, the ordinary lives of the students changes drastically. Many samurai descend on the school grounds. It appears that the entire school has traveled back in time to the Sengoku period. Making things worse, they realize that they are in the time right before the Battle of Okehazama takes place.