Sun, Feb 16, 2020
Hyun Jae asks The Guy who ordered him to kill I Su. The Guy counterattacks Hyun Jae, and Ha Young shoots him at that moment. Su Young notices that Hyun Jae used her to bring out The Guy, and she tells him that she'll never see him again. Meanwhile, Su Young goes to Hongwoon and she gets to meet the boy named Hyun Soo.
Sun, Mar 8, 2020
Su Young remembers that the boy in the car with the doll was smiling. The Guy tells Hyun Jae to find him if he wants to know who wanted I Su dead. Dong Sik joins the RIU for the case regarding Sang Sik's death. Hyun Jae gets to know that Yo Han is The Guy. Meanwhile, Gyeong Su regains consciousness.
Sat, Mar 14, 2020
Hyun Jae gets to know that Hyung Pil manipulated the evidence log. Dong Sik plants bugs in the police station. Hyun Jae tells Su Young to interrogate Yeon Ja. Hyun Jae tells the detectives in RIU Team One that The Guy is the police officer. Hyung Pil decides to kill The Guy himself. Meanwhile, Ji Min and Ha Young try to find The Guy's identity secretly.
Sat, Mar 7, 2020
Hyun Jae finds Soo Tak in Yuseong Psychiatric Hospital, but Soo Tak is not in the right state of mind. Soo Tak escapes from the hospital, and the police start finding him. Sang Sik is found dead all of a sudden. Meanwhile, Su Young finally finds the culprit who hit her mom with his car.
Sun, Feb 2, 2020
Su Young tells Hyun Jae that she wants to join the RIU, and Hyun Jae asks her why she wants to join the RIU. Su Young becomes a temporary teammate of the RIU. RIU tries to find another victim who might be alive. Su Young gets into danger while the investigation and Hyun Jae helps her at that moment.
Sat, Feb 15, 2020
Su Young goes to Hyun Jae to tell him about the crime scene, but he tells her it's too late. Hyun Jae tells Su Young to be careful since the culprit saw her face. Bo Kwang goes to Su Young's place, and Su Young notices that someone was in her room. Meanwhile, Su Young thinks that Bo Kwang is suspicious and she follows him.
Sat, Feb 22, 2020
Hyung Pil orders Ha Young to take Hyun Soo's case because he wants to use this incident as an excuse to fire her. Hyun Jae becomes an official consultant of RIU Team One. Hyun Jae and Su Young start their investigation and find out that Jung Woo is involved in this incident. However, Jung Woo keeps saying that he doesn't remember anything.
Sun, Mar 1, 2020
A man in a black sedan keeps murdering young people who are just about to join the work force. RIU Team One finds a survivor and asks for her help. Unlike his usual self, Hyun Jae passionately helps out the survivor to remember the case. Meanwhile, the detectives are trying to find the secret behind "4789".
Sat, Feb 8, 2020
Ha Young request for the NFS to do the autopsy for Seung Hwan's body. The result of the autopsy says that there's no trace of resistance, and Hyun Jae thinks Seung Hwan was overpowered psychologically. Hyun Jae wants Su Young to think of what she saw, and Su Young remembers everything. With Su Young's memory, the RIU Team One starts finding the culprit who killed Seung Hwan.