Lord Tokugawa Tsunatoyo, bound for Edo to be sworn in as the next shogun, is the target of merciless ninja assassins hired by corrupt officials hoping to put their own candidate in his place. His only hope is the “Oniwaban,” the shogunate’s secret ninja force, sworn to throw their lives down recklessly to prevent this coup. But will they stand a chance of getting the lord to his ceremony in time? A perilous chase, betrayal after betrayal, and a final bloodbath await them as ninja battle ninja in one last, desperate struggle.

The federal lord of Kofu, Tunatoyo (Tsutomu Isobe), was elected to be the next General. On his way on a trip to Edo for the ceremony, his scapegoat was shot. Oometsuke ordered an Oniwaban, Shinnosuke Takusyoku (Mikijiro Hira) to take Tsunatoyo to Edo safely. However, the enemy turned out to be his younger brother and the federal lord of Tatebayashi Kiyotake (Yoshihiro Kobayashi). On top of that, the Oniwaban sent by Kiyotake to assassinate Tsunatoyo was Shinsuke's father-in-law, Genshin Uno (Shigeru Kamiyuama).

Yakuza Gang War is at the height in North Kyūshū Area in the summer of 1950, particularly between the Okagen Group and the rising Hashiden Gang. Now with the mediation/interference of the Americans, they decide to settle it in a peaceful, *democratic* way, that is, to settle it with a baseball game. Now, with its money and power, The Hashiden group soon recruits a group of gamblers known to be good at baseball from the whole country. So, what is the Okagen Gumi gonna do?