The episode starts with Yoon-young giving Tae-heon the photos of Jung-won sitting by Eun-sae’s corpse. At work, Jung-won gets a call from Woo-jae. He meets her and shows her the picture of Jung-won’s necklace which was in Yoon-young’s possession. Suddenly, a news report breaks out about the inappropriate relationship between Jung-won and Tae-heon. Woo-jae asks her if it’s true.
Myung-soo, too, calls Tae-heon and warns him to not meet Jung-won in the meantime. Jung-won realises she may lose her job soon and tells her boss that she has a prime suspect in mind. She asks him for a slot so she can expose the killer on her show before it’s axed.
Ae-na asks Jung-won about the report and Jung-won says it’s not true, but she wasn’t able to say that to her husband. Ae-na realises it’s because Jung-won has feelings for Tae-heon. They then discuss Ba-reun and his real identity. Ae-na remembers that Ba-reun had once said he suffered from the same thing as Jung-won.
Meanwhile, Tae-heon tries to get the photos of Jung-won analysed without officially reporting them. He’s then confronted by Woo-jae, who attacks him in a fit of rage. They fight and Tae-heon reveals that it was only him who had feelings for Jung-won. She rejected him. Tae-heon tells Woo-jae that Jung-won should set up a restraining order against him to get rid of the rumours. On his way home, Woo-jae sets up an interview with a reporter.
Jung-won and Tae-heon meet at a campsite. She apologises for the news report and then tells him her suspicions about Yoon-young. But Tae-heon says Yoon-young’s alibi is airtight. Just as Tae-heon is thinking about the photographs, Jung-won admits she’s lied to him and will explain everything soon.
As they head back, Jung-won sees an article where Woo-jae talks about a restraining order against Tae-heon. The detective says he gave Woo-jae the idea and tells Jung-won to focus on being safe. As he walks away, Jung-won runs after him and hugs him from behind. She says she’s tried pushing the feelings away but failed. He leans in towards her and asks her to give him a minute as well. They then share a passionate kiss.
Elsewhere, Yoon-young barges into Woo-jae’s room and kisses him. He demands to know why she killed Eun-sae and framed Jung-won, calling her a monster. Yoon-young turns it around on him, saying she knows what he’s done. But she promises to protect him.
The next day, Jung-won and Woo-jae talk. Woo-jae seems to have accepted Tae-heon’s explanation of Jung-won rejecting him. But Jung-won admits she caved into the temptation. She admits she likes Tae-heon and that things can’t go back to the way they were. She exits the house, leaving Woo-jae distraught.
Sometime later, Tae-heon visits Woo-jae and tells him about the photographs of Jung-won. He says the photos prove the existence of hidden cameras and that Jung-won was set up. He says Woo-jae is the only one he can turn to for help now.
Jung-won’s mind wanders towards Mo Soo-rin, under whose name Yoon-young’s clinic is established. She goes to Soo-rin’s cafe and talks about her relationship with Yoon-young. Jung-won lies and says that Yoon-yeong’s alibi was proven fake and that she was hiding in Unit 1401, where Eun-sae was killed. Soo-rin unwittingly reveals that she knows the layout of the unit and when Jung-won probes further, she tells her to leave. Outside the shop, Ba-reun watches Jung-won.
Back at the police station, Tae-heon gets a call from Jung-won who tells him she’s suspicious of Mo Soo-rin. Tae-heon then speaks to the detective in charge of the Bongto plant fire case. The man confirms that Mo Hyung-taek told the police to not report a second ignition location during the fire. Meanwhile, the politician himself speaks with Kang In-han, who confirms that Jung-won’s show is going to be cancelled soon.
Jung-won suddenly gets a text from Zeus. He’s sent her photos from Mo Soo-rin’s mobile phone. The photos include pictures of Unit 1401. Jung-won presents this to In-han but realises that Assembly man Mo has been bribing him. Before she leaves, In-han reveals that he’s pulled some strings to ensure she gets three minutes live on TV. Jung-won gets ready for her segment and informs Tae-heon about what she’s about to do.
While going through the Bongto case files, Tae-heon finds something. The news segment begins and Jung-won talks about her necklace. She links it to A (Yoon-young) and her ‘accomplice’ B who had photos of the apartment on her phone. Just as Jung-won is about to reveal the truth about herself, the studio cuts her off. Meanwhile, Tae-heon shows up at Yoon-young’s office and arrests her for illegally prescribing propofol. Turns out, it was Woo-jae who gave him this information.
Elsewhere, Mo Soo-rin is told to get on a plane to New York. Tae-heon interviews Yoon-young and asks her if she went to Unit 1401 that day. She says she did. And that Woo-jae was there too. A flashback shows Eun-sae telling Woo-jae about her pregnancy. Yoon-young comes by pretending to get coffee for Eun-sae but leaves when she sees them together.
At present, Yoon-young keeps lying to Tae-heon but Woo-jae tells the detective the truth through an earpiece. Woo-jae says Yoon-young blackmailed him to send Jung-won to her, or she would reveal his affair. Tae-heon then brings up Lee Na-ri, whom Woo-jae was dating back in school. A flashback to fourteen years ago shows teenage Woo-jae and Na-ri going on dates. A young Yoon-young watches angrily from the sidelines.
Tae-heon then suggests that Yoon-young has had Soo-rin commit all the murders. He points out that they’ve been close since high school and accuses them of setting fire to the Bongto plant as well. Just then, Yoon-young mentions the photos of Jung-won, officially mentioning it on the record while Tae-heon has kept them hidden. She also mentions the blood on Jung-won’s sleeve that day. She smiles and reveals she expected Woo-jae to pull this, so the detectives won’t find anything while searching her office. Later, Myung-soo tells Tae-heon that the raid was indeed of no use.
Soo-rin, meanwhile, is praying in a church. A flashback to the day of Eun-sae’s murder shows Soo-rin sitting with Yoon-young. Yoon-young tells Soo-rin that Eun-sae suspects her and her father. She’s going to expose them for Jin Myung-sook’s murder and the Bongto fire. She then gives Soo-rin a knife, telling her this will solve their problems.
Pan-ho tells Woo-jae to meet him. Woo-jae says that Yoon-young won’t be arrested till there is evidence and then informs Pan-ho of the connection with Mo Hyung-taek.
The next day, Jung-won meets Ae-na and tells her she plans to hold a press conference that day. She’s about to expose her own secret but she’s too late. Somebody sends the video of her in Unit 1401 to the police. Tae-heon is dismissed from his post and Jung-won comes home to find the police searching her house. They find blood on her shoes and Jung-won gets arrested.
