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.

美好的恋爱。有意义的工作。结婚生子。女性寻求的「幸福」有多种多样。但是你在追求幸福当中，是否在某个阶段认为「人生就是这样的」而妥协，要么推卸责任，「无可奈何」而放弃了呢？
丸冈高子（永作博美饰）绝不妥协也不辩解，自己选择自己的生活方式，是凭自己的力量与各方面斗争的女刑警。单亲妈妈的高子，携带着快一岁的儿子，一般的规则和常识与周围的视线置之度外。而且为了破解疑难案件，连违法搜查以及拷问也强行的坏妈妈。另一方面，新人刑警长岛葵（香里奈饰），虽然正义感强、拼命努力，但有点傻乎乎，心灵却像少女。与高子不同，充满着对恋爱、工作、理想的憧憬。可是被高子无厘头地摆布，像保姆一样任意使唤，结果与恋人的关系也开始起乌云…。
既是单亲妈妈又是能干的女刑警和整日被她折腾的警察实习生，有时强悍地、有时豪爽地解决各类案件，同时探讨「女人真正的幸福到底什么」这个深奥的难题。