After a battle with Mao and the Arm of Kannon, Ryo Kanmu gets sent back 700 years in the past with his right arm infected by the Arm of Kannon. He wakes up after seven years of unconsciousness and finds the power in his arm confined by the Ofuda given by monk Daikaku. The leader of the Nobushi warriors and Lord of Akasaka Castle, Mikami-Danjo, discovers that Ryo Kanmu possesses the powers of the arm and plans to get Ryo on his side to conquer the country.
<we got more stuff on
Arm of Kannon>