With his western borders secure, Oda Nobunaga turns his attention east in the direction of the Shogun. When diplomacy fails to subdue the Saito clan that stands between him and Kyoto, Nobunaga enlists the aid of his brilliant diplomat and engineer, Toyotomi Hideyoshi. Toyotomi turns the Saito's vassals against them and constructs a fort for Nobunaga's samurai to siege Inabayama Castle. After his crushing victory, Nobunaga allies with the former Shogun's brother and uses him as a political shield to take Kyoto.