In the Sengoku Period of feudal Japan, many warlords from different clans fight in an endless struggle for power and unification of Japan. Takeda Shingen sends the hot-blooded Sanada Yukimura across the mountain pass to attack Uesugi Kenshin at night. However, Yukimura instead encounters the fierce "One-eyed Dragon of Oshu", Date Masamune, who's also after Kenshin. A rivalry starts when Masamune and Yukimura engage in an intense fight until Sarutobi Sasuke intervenes. Masamune and Yukimura return to their respective camps and withdraw from battle. The next day, when Shingen sets out to attack Imagawa Yoshimoto, Yukimura comes across Masamune in the battlefield, following him in pursuit.