Seoryun Medical Center's legal team stops the police's interrogation of Joong Yeop, the main suspect, and he is free to leave. After having drinks with the investigation team, Jae Hwan opens up and tells Eugene about his father's death. Now safely at his house, Joong Yeop recollects what happened at the Macheon Police Department when he was young. Later, Joong Yeop shows up at Eugene's lecture and brings up the past.

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. While Jae Hwan and Eugene look into Joong Yeop and Lee Sang Woo's relationship, Joong Yeop tells an enlightening story. Meanwhile, another explosion takes place.