Attempted murder, fraud and embezzlement, illicit drugs, tax evasion and even murder? Five women convinced of various crimes and a crime-loathing female warden put aside their differences to hatch a grand plot of revenge against a handsome but crooked company CEO. But the revenge plan keeps hitting snags. Written by Kankuro Kudo, all of these mature women with interesting back stories meet in a female penitentiary and band together to clear each other of unjust sentences in this blockbuster female crime story rich in laughter and tears, brilliantly merging the comedy and cheerfulness of Kankuro Kudo storytelling with serious deeper questions of why we’re all here and what constitutes true happiness.

It is a warring period in feudal Japan. The warlord, Nobunaga Oda, is rapidly vanquishing his foes on a quest to pacify and unify the country under his rule. However, there is one domain that he forbids to lay a hand on, that of the Iga ninja, whom even the great Nobunaga fears most. The Iga are known to wield extraordinary and supernatural powers as invincible weapons of war who will assassinate anyone for money, and money only. They don’t think of people as human and are dubbed “the killer clan”. But there is one Iga ninja, Mumon, who while peerless in ability is indolent and taken to task for an inability to earn much of an income. In the fall of the year Tensho 7, Nobunaga’s second son, Nobukatsu Oda, decides to ignore his father’s orders and attack the Iga country, partly encouraged by Taizen Heki, a man who had once turned on his master and was now employed as a vassal of Nobukatsu. Heibe Shimoyama, whose brother had been killed by Mumon also seeks revenge on the 12 Iga ninja core, including Sandayu Momoji and Kai Shimoyama. Amid various colliding interests and schemes, ultimately, a major bloody showdown is coming between Oda’s army and the Iga ninja.

The late 1960s. Alone, young man who spends his days brawling and stealing drifts into a Tokyo flophouse district. His name is Joe Yabuki. There, he meets alcoholic former boxer Danpei Tange, who senses a natural born fighting talent in Joe. However, soon after Joe is sent to a reformatory for assault.
Danpei sends Joe a letter while he's incarcerated. Entitled "For Tomorrow," it explains the basic boxing technique of the jab. Even inside, Joe stirs up trouble and gets into fights during which he encounters a powerful, champion-level pro boxer named Rikiishi. After their release from incarceration, Joe and Rikiishi both progress as professional boxers in their respective weight classes. Joe vs. Rikiishi – the ring of the bell sounds their destiny!