A wondrous romance. Satisfying work. Marriage and having children. Women pursue myriad paths of "happiness." However, as you seek out your own happiness, do you find yourself lowering your standards by saying, "Oh well, maybe I was expecting too much," or making all sorts of excuses by saying, "Oh well, it couldn't be helped," and just give up?
Takako Maruoka (Hiromi Nagasaku) is a female detective who never makes excuses, never compromises, chooses her own way of life, stands on her own two feet and never gives up fighting. Being a single mother, Takako takes her one-year-old son wherever she goes. She disregards rules, common sense and people around her. She conducts illegal investigations and even torture, if necessary, to solve a case. Takako is a true "Dirty Mama." In contrast, Aoi Nagashima (Karina) is a female rookie detective with a strong sense of justice and solid work ethics, but she's also a little slow and has the mind of a young, dreamy girl. Unlike Takako, Aoi's mind is filled with dreams and hopes for love and for her newly-assigned work. However, dealing with Takako's dirty, reckless work and being used as Takako's babysitter cast a dark cloud over the relationship between Aoi and her boyfriend.
A single mother detective and her rookie buddy work together to seek "true happiness for women," while scouring the streets to investigate cases with aggressiveness and dynamism.