Se Rin tried to contact Ga Hyun and Hyung Jo but nobody picked up. A few hours later, Ga Hyun felt the urge to search for Se Rin, so she called Hyun Jo. They tracked her phone and found it at the side of the road broken but Se Rin was nowhere to be seen. Ga Hyun recalled that Young Woong's phone was with Se Rin.
They contacted the number but it couldn't be reached, so they tracked Young Woong's phone instead. It led them to a dark lot under road sewage. Hyung Jo took out his flashlight and saw Se Rin's dead body. He called the police right away. Ga Hyun was devastated about Se Rin's death.
Jung Tae is the primary suspect as the police found his house with marks of Se Rin and ropes all over the place. Hyung Jo tried to check the log in calls of Se Rin's number, it was Lee Shin's number she talked with. They summoned Lee Shin for a police interview of Se Rin's case. Hyung Jo asked about the recording videos of Lee Shin's clinic. Shin explained that she only advised Se Rin to stay outside Seoul but she didn't follow.
Meanwhile, on the night of Se Rin's murder, Jung Tae went to Zhen's Clinic to ask help from Lee Shin. He mentioned that Se Rin escaped when he tried to bring her to the hospital. Lee shin explained that they couldn't do anything since time is not enough to save Se Rin.
Sa Kyung was one of the detectives who checked the recording videos of Jung Tae's neighbors. They saw a man wearing a black coat, and Hyung Jo recognized him as Jae Young. They summoned him for interrogation but he got his lawyer with him, so he was released right away. Jae Young is the son of the Ministry of Education.
A group of men took Jung Tae in a secret place, they tied him and threatened to kill him if he released videos of Jae Young's deed. They threatened him that they will make his sister suffer if he doesn't stay away from Jae Young.
Hyung Jo and his team got recordings from Se Rin's phone. They found out that before Se Rin's death, she was able to encounter Jae Young outside her apartment. He was looking for Young Woong. Another video recording Hyung Jo got hold of from the building where Se Rin stayed. Hyung Jo used the voice recording and video to summon Jae Young for interrogation. During their interview, he asked him if he killed Se Rin but Jae Young denied all the allegations.
Lee Shin sent the video recordings of Se Rin and her activities. Hyung Jo checked the video and saw Jung Tae visited Lee Shin before Se Rin's death. He stayed and talked with Lee Shin on matters they only knew. This left Jung Tae out of the picture as one of the suspects. Jung Tae tried to contact Hyung Jo and asked to meet him so they could talk. He went home and stayed in his place while waiting for Hyung Jo.
A few minutes after, his doorbell rang. He opened the door and as he turned around, he got stabbed several times. He looked up and uttered the word "detective."
Ga Hyun created a map around her board of the resetters who died in the past. She found out that all the victims died near the Makang Police station. It's the area where Hyung Jo is assigned. She tried to reach him. Then, the phone of the man in Jung Tae's house who was holding the knife started ringing.
