An sees in his vision that it was Seong Mo who framed Geun Taek to protect his mother. Found at Unit 1501, right before his arrest Seong Mo confesses to An about everything. Seong Mo admits all of his crimes and even hands out the ledger he had that includes all bribery behind YSS Construction and high authorities. Jae In, An, and the whole Investigative Unit come together to finally put things back to where it should be.

Seong Mo takes Eun Joo out from the police station. After Seong Mo helps Eun Joo’s identity get reinstated, they part ways. Meanwhile, An starts to track what he saw in his vision, and he ends up at Yeongseong Apartment. An and the police find Kang Geun Taek in an empty unit. An also sees what Seong Mo did in the past in the apartment.

An tries to make Eun Joo talk again, but he fails to get anything from her. Meanwhile, the police find surveillance camera footage of Seong Mo. According to the footage, they start to track Seong Mo. Jae in and Lieutenant Nam head to a hospital where they believe Geun Taek is confined.

An finds out that Seong Mo knew Kang Geun Taek was at Kangguk Station and that he sent An and Jae In to somewhere else to save their lives. An keeps blaming himself. Meanwhile, Eun Joo is questioned by the police. She starts to talk everything she remembers from the Hanmin Care Home.

Ji Soo, together with Jae In and An, go to where Eun Joo first lived and find out her and Seong Mo’s painful past, that they were trapped in a basement with shackles for nine years. Besides, they also find out that Yeongseong Apartment fire, Hanmin Care Home fire, the murder of Kim Gab Yong were all committed by Kang Geun Taek, the man who confined Seong Mo and Eun Joo and abducted Jae In. However, there is another cruel truth awaiting Ji Soo.

Jae In is kidnapped by a mysterious man who looks familiar to her. Although the police have his picture from the security camera footage, they still can’t catch him. Seong Mo disappears and Ji Soo keeps tracing where Eun Joo is and finds out that she attempted suicide on the day she made a briefing about Kim Gab Yong and the two victims. Meanwhile, Ji Soo investigates Eun Joo’s background and is about to dig out Seong Mo’s awful childhood.

An is terribly shocked to know that Jae In’s father was the arsonist of Yeongseong Apartment fire, and he runs away from Jae In. Ji Soo strongly believes that Seong Mo’s mother is still alive and is now living as Kim Song Hee. However, Ji Soo doesn’t understand why Seong Mo keeps it as a secret to her. Meanwhile, the security camera around the security center is down again, and Jae In runs into a suspicious man.

Dr. Hong and Ji Soo discover something strange from the autopsy of Kang Eun Joo. Moreover, they are shocked that the composite sketch of Kang Hee Sook looks like Eun Joo. Meanwhile, An and Jae In go on a first date. With his unusual ability, An accidentally finds out that Jae In’s father was the culprit of the arson at Yeongseong Apartment.