In the past, Jeong-won told Tae-heon about her father’s cold case while Tae-heon was on surveillance duty.She said she fainted and did not see the killer's face, even though he was there.She then promised to catch the criminals and expose them on her show.They also decide to make this stakeout mission their first date, and she kisses him.

Back in the present, Tae-heon asks Jung-won about her necklace.He also learned about the erroneous text message from the therapist's clinic.Jeong-won insists she didn't go and says she would never kill someone the way her father was killed.Nonetheless, Tae-heon asked her to write down her actions that day.

Meanwhile, Woo-jae visits Jung-won's therapist Yoo Yoon-young.Their relationship is closer than one might think, and Woo-jae turns to her for help.

While pondering the loss of the necklace at the crime scene, Jeong-won almost crashes her car.Mingxiu, who was following her, offered to help, but she refused.He called Tae Heon and told him the same thing.

At home, Jung-won looks through the photos she took of Eun-chae’s body.There is no necklace in Eun Chae's hand.She asked Zeus to find the police crime scene photos.The next morning, Zeus sent her the photo.In these photos, Eun-chae has the necklace in her palm, but not the pendant.

At the police station, Tae Heon confirmed that Eun Chae bought the necklace himself and did not steal Zhen Yuan’s.Now, they need to focus on finding Woo-jae's mysterious woman, who was also seen entering the leader's palace that night.

Just as Tae-heon predicted, Woo-jae comes to them and demands to know why Jeong-won is being interrogated.Tae Heon confronts him about the third woman and says Eun Chae also knows about her.

At the news station, Jung-won’s boss says their show may be replaced.Jeong-won sees protesters outside her office when she arrives, but her boss warns her in time.He tells Jung-won that the CEO has decided to change the show and leaves.

While checking Eun-chae's call history, Tae-heon discovered that she called Mo Hyung-taek's secretary Song Hyo-sung.This was just three days before her death.The two detectives interviewed the secretary.He said that he accidentally discovered that Eun Chae was being threatened by a stalker and came forward.She took his number and later called him to invite him to dinner to express her gratitude.

Jeong-won tries to go to the CEO's house, but encounters Noh Ji-ho, who says her boss is asleep.Then Jeong-won gets a call from her colleague telling her about Chairman Seol’s relationship with the CEO of the company.She visited him and asked him to talk to the CEO.Chairman Seol agrees to do this if she stays with Woo-jae until the case is over.When Jung-won walks out, Woo-jae is waiting for her.He asked about her police interview, but she didn't explain anything and accused him of pretending to care.

Eun-chae's agent contacted the detective and said Eun-chae wanted to hire a bodyguard before she died.They told her Song's story about the stalker, and she recalled a similar incident.The agent recognized him from the list of security personnel at the leader's palace - a man named Kim Min-cheol.Tae Heon sees Woo Jae’s name marked on his calendar.Detectives found Kim Min-cheol and captured him.He said he went to high school with Woo-jae and borrowed money from him.

Jeong-won approaches her workplace, this time, talking to reporters.She shows support and love between Woo-jae and herself.In the office, Kang In-han tells them that the show has not been cancelled.But her colleagues seem betrayed by Jung-won's sudden change in behavior.

Later, Zhenyuan received a call from Hye-won, a woman who works in a treatment clinic.She explains why she had to tell the police about the text messages, and then says she was close to Eun-chae.After the call, Zhenyuan followed her on IG.

Tae-heon meets Jung-won in her hotel room and demands to know why she lied.He even thought it was part of a conspiracy between the two of them to kill Eun Chae.He then sees the photo of Eun-chae's body on Jung-won's laptop, but she turns it off before he can take a closer look.He then saw a red coat in the room and told Jeong-won about another woman Woo-jae had seen, who was wearing a red coat when she entered the leader's palace.

While taking more things from her house, Jeong-won meets Woo-jae.He said that he had joined his father's company, so his father would help Zhenyuan.He told her not to go back to the hotel.She told him to sleep in the bedroom and agreed to sleep on the couch.

While he slept, she looked for something.He caught her, but she said it was one of her USB sticks.She walked to the parking lot and placed a tracker on Woo-jae's car.She then listened to Woo-jae's recording from the USB drive she had hidden.

The next day, Jung-won tells Woo-jae that she’ll give him a chance.But she actually uses it to investigate him.Later, Jung-won admitted this to her therapist.She plays the recording of Woo-jae telling someone not to let anyone find out they were at the crime scene.She needed to find out who he was talking to.

She admits that she told Yoon-young for insurance, in case something happened.Yin Ying received the call and walked out.While she's away, Jeong-won spots a red coat on a hanger.She took a photo.At this moment, Tae-heon sent her a video of Woo-jae and the woman in red in a cafe.Finally, she realizes that this woman is Yin Ying.