Prosecutor Yoo joins in the investigation and personally visits Kang Do Sik's house, who is responsible for Si Hyun parents' death, and as a result, finds himself in the hospital. Si Hyun sketches a picture that's identical to the scar Prosecutor Yoo gets from a chase and later finds out Kim Do Jin is behind his kidnapping. She heroically saves her brother moments before Detective Kang loses his chance to arrest Kim Do Jin.

Si Joon reveals himself to Do Jin. Do Jin gets shocked as the unexpected person shows up. Meanwhile, Dong Soo and Si Hyun look for the wife of Pil Gyu, who ordered Do Sik to steal Si Hyun's father's notebook. Pil Gyu's wife tells Dong Soo and Si Hyun that another person came by to ask about the incident that occurred 20 years ago. Dong Soo feels that this incident is related to Ji Soo's death and looks for the USB.

Moon Gi feels thankful towards Tae Joon for saving his life. However, Moon Gi is suspicious of Tae Joon as he does not request for anything in return. Nabi Team believed that Jung Yeon is the Elder, but they get devastated when they find out that Jung Yeon is not the Elder. Meanwhile, Si Hyun starts to draw another sketch and finds a drawing that shows someone's death. Who could it be?