Yul Seong runs after Sara outside, seeming interested in Young Ah's reliance on Sara. He also mentions that Seo Yeon will soon return to the country and would agree to let her meet the boy if the two reconcile. Sara has no words for Yul Seong's despicability; he wants them to get back together, and for her to help him win Young Ah's favor and proceed with the Cha Yul Town project. Sara firmly refuses and moves away. In the evening, Seo Yeon calls her to say the boy will soon have a summer break and wishes to meet his mother. Afterwards, Sara goes drinking with a friend, feeling very distressed because she misses her child. The next day, Yul Seong even sends flowers to Sara at the Solution office. She tears up the flowers and sends them back to his mother with a message to watch her son carefully and keep him from bothering sara. The chairman is very annoyed because Yul Seong embarrasses her, but he still tells her about his plans and is determined to pursue Sara. That night is the anniversary of Sara's mother's death, and Kang Bom and Gi Jun come over to help her prepare. Later, Yul Seong also brings fruit and ritual offerings. Sara sends him away, but he mentions Seo Yeon, which makes her waver. At the memorial service, Sara shows Gi Jun a photo of her mother, and he recognizes her as the woman who had reported Yoo Mi to the prosecutor's office. Sara is very agitated to learn this, and they also see her being followed by a strange man, making Sara feel that her mother had not committed suicide but had been murdered, although they currently have no concrete evidence. The next day, they visit the old noodle shop of Sara's mother. The owner of the shop next door also comes out to greet them, and they ask her about Sara's mother before her death and if she knew Yoo Mi. She says she has never seen Yoo Mi, but a few days before Sara's mother died, she was very concerned about a part-time employee named So Hee. Realizing this girl might know something, they decide they must find So Hee. Meanwhile, she is hiding from her abusive boyfriend. Yul Seong's people also come after her, forcing her to flee her home. That night, Gi Jun and Sara find So Hee as she is again harassed by her boyfriend near her part-time job.

Sara asks So Hee about who is chasing her, and So Hee says she doesn't want to be involved anymore. Sara feels she knows about her mother's report to the police, so she chases after her, but So Hee has already run away. The next day, Sara texts So Hee, persuading her to cooperate, and eventually, she agrees. So Hee then goes to Solution's office and recounts her part-time work at Yul Seong's engagement party. There, she accidentally recorded Yoo Mi blackmailing Yul Seong about their affair and the bribery involving a group of five, and then Yul Seong sending someone to eliminate Yoo Mi. Due to this, So Hee went with Sara's mother to the prosecutor's office the next day. However, she went to the restroom, and when she came out, she sees Sara's mother being taken away in a car by a man with Yul Seong's secretary. The next day, Secretary Jang and Yul Seong meet, he gives her money and asks her to terminate the contract, but she ask him to consider her as a matchmaking candidate to be his wife. Just then, they encounter Chairman Cha Yul and Hee Jin, who introduces herself as Yul Seong's girlfriend.

That night, So Hee decides to go to the police, but upon leaving her house, she is confronted and bullied by her ex-boyfriend, who accuses her of contacting a lawyer, he acts jealously, and brutally assaults her. Sara and Gi Jun go to pick up So Hee but find her missing, and her phone is not answered. Meanwhile, the ex-boyfriend pushes So Hee, causing her head to hit a brick wall, killing her instantly. When Sara and Gi Jun finally get through, So Hee is already in the morgue. That night, Gi Jun takes Sara home and comforts her. However, finding her not answering her phone, he worries and returns, finding the door unlocked with his birthday as the code, Sara inside has fainted from stress. Gi Jun stays to take care of her until she wakes up. The next day, Gi Jun seeks the driver who transported Yoo Mi on the night of the accident. A former colleague says he has quit driving a taxi to work for a company. Arriving at his house, Gi Jun finds it unlocked, empty, but there is a pair of luxury shoes worth 9 million won. Meanwhile, the driver is meeting with Chairman of Cha Yul. Sara meets with Young Ah to decline a full-time role in her election campaign, offering instead to be a consultant. Young Ah finds this interesting and agrees, mentioning Yul Seong has sent flowers to her and even Sara's name is on the bouquet. This further convinces Sara of her secret plan, which she shares with Young Ah. That morning at Solution, Sara receives flowers from Yul Seong again but this time she wants to accept them. She also tells Gi Jun that she wants to return to the house of cha family.