9. Optical Illusion

Ha Tae-sik, arrested as a suspect in a new murder case, mentions another secret related to the bombing incident five years ago, and Oh Hyun-jae tries to uncover the hidden secret in less than 48 hours. Meanwhile, Soo-young finds a clue regarding the hit-and-run vehicle that killed her mother, and Hyun-jae discovers something strange in the witness statement regarding the Ha Tae-sik case.