In this era where it's said that 1 in 3 couples get divorced every 2 minutes and 19 seconds, most of them negotiate their divorce matters together but the remaining get third parties to facilitate the process. However, about 2.4% of the couples who have to resort to a trial if the mediation process does not proceed as planned. The title of the drama comes from the fable "Kitakaze to Taiyo" which describes the leads who are lawyers with exactly opposite characters helping couples face off in court.
Saenai (Shinichi Tsutsumi) is an ordinary salaryman, married to Enko (Kyoko Koizumi) and having a daughter and son. One day, he meets a mysterious old man who forces him to take a super suit with superhuman powers. Saenai is constrained to keep the peace. After he resolves trouble and takes off his super suit, his activities slip from the mind's of other people.
Ahn Joong-Hee (Lee Joon) is an actor who used to be a member of an idol group. One day, he appears in front of a family who consists Byun Han-Soo and Na Young-Sil and their 4 children including Hye-Young and Mi-Young (Jung So-Min). Joong-Hee begins to live wth them.
Yoo Ji-Na (Uhm Jung-Hwa) has been a popular singer for the past 20 years, but she holds pain inside because of something she abandoned when she was younger. Meanwhile, Jung Hae-Dang (Ku Hye-Sun) began working as a Yoo Ji-Na impersonator to support her family after her father lost his job. She sings on stage at a club and tries hard to mimic Yoo Ji-Na's songs.
Yosuke Tomikawa (Tomokazu Miura) is married to Mizuki (Hitomi Kuroki). They have a daughter, Shiori (Atsuko Maeda), and son, Ko (Asuka Kudo). Yosuke works as the general manager in the personnel department at a large company. His wife works as a teacher at a private middle school. Their daughter works as a jewelry maker and their son is looking for a job. The family appears to look like a peaceful family, but, due to an accidental opportunity, the family begins to collapse.
Mizuki Hayase (Haru) is 25 years old and her mother Akiko (Yuki Saito) is 50 years old. Mizuki Hayase teaches English at a girls’ high school. Aikiko is a devoted mother to Mizuki and Mizuki totally trusts her mother. In fact, the two are like best friends. Mizuki’s father Koji (Yasufumi Terawaki) is like an outsider in the relationship between mother and daughter.
Housemaker Matsushima (Yuya Yagira) begins working for the Hayase family. Matsushima gets close to the mother and daughter. While Mizuki spends time with Matsushima, she realizes that has been too dependent on her mother. Soon, Akiko feels like her daughter is getting more distant from her. Akiko, afraid of losing Mizuki, makes the dangerous decision to seduce Matsushima.