The movie is set in an aftermath of the sudden dispersal of a legendary town called "Mugen," and recounts the story of the five organizations, who aims to take control in the said area. These five organizations are known as Sanno Association, White Rascals, Rude Boys, Oya High School and Daruma Hooligans.
The five gangs will put their pride on the line as all of them take part in a fierce battle for dominance. However, the plot takes a surprising twist when a mysterious group called "Mighty Warriors" suddenly appears.
Segawa Kiichi or otherwise known as "Keebou" has recently moved back to his hometown due to a business transfer after years of life in Tokyo. Kiichi is a mediocre salesman for a medical-equipment manufacturer.
One day, when he goes drinking at a hostess pub with one of his colleagues, he is confronted with a former gang member turned yakuza leader, Tagawa. Kiichi used to be a leader of a small gang called "Who Are You" back in his youth himself and the two are familiar faces. Tagawa tells his group that Kiichi let his own team get beaten up ten years ago and that he is the most cowardly living man of the century. Tagawa and his yakuza group have captured a 10-year-old girl for some reason, and although he does not want to get involved at first, Kiichi ends up helping the little girl escape from them. Soon, he pays the price for it. When members of Kiichi's old gang, "Who Are You" learn of their leader's return and the adverse circumstance he is in, they round up to take on the yakuza to save him despite their resentment for their leader's betrayal a decade ago.
The story focuses on a group of mothers who all have children around the same age. These women form a bond through sharing their anxieties about raising their children, each coming from a different background. However, the friendship between the five women also turns to jealousy and betrayal, due to the fact that their children are all taking similar entrance exams for elementary school.
Anne plays the protagonist Yuko, whose set of values as a woman, wife, and mother have been overturned, and she struggles to climb back from her fallen state.
Meanwhile, her four fellow mothers are hiding serious problems at home, despite their appearances. Ono Machiko plays a woman receiving verbal abuse from her husband on a daily basis, Kurashina Kana plays a “yankee mama” who got pregnant as a teenager by a truck driver, Ryo plays a capable woman running her own online shop, and Kimura Yoshino plays a popular reader model for a women's magazine.