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It’s Yu Ri’s first day at Law Firm Daejeong, 1 of Korea’s top 3 law firms. She thought she’d be joining the corporate department, but instead, she was assigned to the divorce department. Eun Kyung, the nation’s divorce attorney, instantly knows that Yu Ri isn’t the right material for a divorce attorney. However, Yu Ri tries to win the case in her own way.

Yu Ri’s straightforward nature struggles to comprehend some of the methods Eun Kyung employs. She is particularly shocked when she sees Eun Kyung persuading her clients to prioritize economic benefits over child custody. To Eun Kyung, who possesses far more experience than a novice, Yu Ri is just a rookie in the big leagues. What astonishes Yu Ri even more is Eun Kyung's reaction after she reveals a little secret she’s discovered.

Yu Ri is surprised to hear that Eun Kyung doesn’t want to divorce Ji Sang even after finding out about his affair with Sa Ra. Yu Ri finally starts a session with a client on her own and gets her first case. However, the client decides to drop the lawsuit. Yu Ri decides to quit working for the divorce team.

Eun Kyung asks Yu Ri to represent her for her divorce case against Ji Sang. Eun Kyung sends a letter of complaint to Sa Ra, letting everyone in the office know that she was involved in an unsavoury incident. Rumours about Eun Kyung and Ji Sang’s divorce circulate, but Eun Kyung doesn’t even bat an eye.

Ji Sang secretly leaks to a reporter that Eun Kyung might have an office husband and that she had an affair before him. Yu Ri decides to hear whether Eun Kyung and Woo Jin had an affair or not. Yu Ri convinces Eun Kyung to settle, but Eun Kyung doesn’t give in. Meanwhile, Yu Ri comes up with a brilliant idea to change the public’s opinion of Eun Kyung.

The first hearing of Eun Kyung and Ji Sang’s divorce trial begins, and neither side wants to give up the custody of Jae Hui, their daughter. Jae Hui misunderstands Eun Kyung’s intention and thinks she wants to let her live with her father. Meanwhile, Yu Ri takes on a case of a couple who want to give up their custody.

As soon as Sa Ra gets promoted to chief manager, she gets dismissed from the law firm. Ji Sang tells Sa Ra that he has no intention of marrying her even if he gets divorced, which leaves her devastated. Meanwhile, Yu Ri’s stepmom comes to see Eun Kyung and threatens her to fire Yu Ri.

Sa Ra is pregnant with Ji Sang’s child. However, Ji Sang’s lawyer advises him to abandon Sa Ra to win custody of his daughter. Sa Ra secretly puts the ultrasound picture of her baby in Jae Hui’s room, and Jae Hui eventually sees it. Meanwhile, Jae Hui finally meets the family investigator.

Eun Kyung finds out that Jae Hui knew about her dad’s affair with Sa Ra even before she did. Ji Sang breaks up with her after hearing what Sa Ra did to Jae Hui. Eun Kyung becomes emotional after finding out about Sa Ra’s pregnancy and what she did to Jae Hui. Hence, Yu Ri looks for a way to calm her down.

Jae Hui confides in Yu Ri that she wishes her parents’ divorce trial to end soon so that everyone can move on. She also chooses to live with Eun Kyung instead of her father and lets him know how much his lies hurt her. Meanwhile, Sa Ra miscarries her baby, and her relationship with Ji Sang ends.

Mr. Oh suggests Eun Kyung to go on a vacation and resign once she returns. Eun Kyung decides to go on a trip with Jae Hui, but things don’t go too smoothly. The Divorce Team gets twice as busy with Eun Kyung gone. Meanwhile, Yu Ri takes on a case and solves it on her own for the first time.

Daejeong signs an MOU with Chun Medical Foundation and takes a divorce case from its chairman, Chun Hwan Seo. Mr. Oh assigns the case to Yu Ri instead of Eun Kyung, and Yu Ri learns from him that he intends to fire Eun Kyung soon. Meanwhile, Eun Kyung finds out that Woo Jin will become the managing partner of Daejeong.

Chun Hwan Seo calls Eun Kyung to his house, and she finds his wife unconscious on the floor. Yu Ri, who was waiting outside the house, calls the police when she doesn’t hear from Eun Kyung. Meanwhile, Woo Jin comes up with a plan to deal with the mess Chun Medical Foundation put Daejeong into.

Eun Kyung decides to leave Daejeong and open up her own law firm. Although she starts out with a big ambition, it doesn’t turn out as well as she expected it to be. Yu Ri is given a choice to switch teams, but she hesitates. A new client visits Eun Kyung, but she sends her to Yu Ri, and Yu Ri does the same for Eun Kyung.

Eun Kyung realises that Yu Ri is the opposing counsel of her new client. They meet up to discuss a settlement, but they fail to find the middle ground. Eun Ho decides to leave Daejeong after much consideration and joins Eun Kyung’s new firm. After Eun Ho leaves the firm, Yu Ri realises how much he means to her.

A year passes and Oh Dae Gyu's wife, Park Ae Yeon, files for divorce at Law Firm Daejeong, and Woo Jin assigns Yu Ri to take the case. Flabbergasted at facing his own company against him, Dae Gyu asks Eun Kyung to represent him. As Yu Ri and Eun Kyung try to settle outside the courtroom, Dae Gyu has a sudden change of heart. Meanwhile, Eun Kyung thinks of letting Jae Hui spend time with Ji Sang.