Joong Yeop takes control of the situation and flees the scene from the prosecution. As the police chase him down, a secret message is sent to Eugene. She and Jae Hwan meets with Joong Yeop. Jae Hwan and Joong Yeop have a tense moment.
Without an attorney at his side, Joong Yeop agrees to get questioned by the police. Jae Hwan tries to get him to talk but ends up losing his temper. With Eugene's interrogation, he skillfully avoids answering any questions.
Kang Sang Gu is taken in as a suspect of the Chimera Murders. Solid evidence is found at Sang Gu's home, and he confesses to all the murders he committed as the Chimera. Something however, tells Jae Hwan that the case is not over yet.
Jae Hwan and Eugene question Lee Sang Woo's death 35 years ago. As they dig into the case file, they come across Bae Seung Kwan's name, the current chief of police. Slowly, the truth behind what happened 35 years ago becomes revealed.
Joong Yeop turns himself in, and is taken to a remote mountain by the prosecution. He is made to walk deeper into the woods at gunpoint until they arrive at a cliff. A suspicious package is delivered to Chief Bae's office
Hyo Kyung calms Joong Yeop, and she learns about the whole truth behind the Chimera Case that happened in the past. When Hyo Kyung meets Joong Yeop again, she notices a tail. As Jae Hwan rushes to help him, a bullet strikes Joong Yeop.
Jae Hwan asks Chief Bae why Hahm Yong Bok got discharged 35 years ago, but Chief Bae becomes defensive and doesn't give him an answer. Meanwhile, Agent Hathaway finds suspicious things about Kang Sang Gu and keeps a close eye on him.
Jae Hwan tells Captain Ko Gwang Soo that Hahm Yon Bok was in charge of the Chimera Case 35 years ago and shares his suspicions surrounding Lee Sang Woo's death. Meanwhile, another explosion takes place.
After Ju Seok's death, a special task force gets formed. Jae Hwan gets interrogated for being at the crime scene, and he tells them that the water caught on fire. However, no one believes him.
Seoryun Medical Center's legal team stops the police's interrogation of Joong Yeop, the main suspect, and he is free to leave. Now safely at his house, Joong Yeop recollects what happened at the Macheon Police Department when he was young.