Tae-sik and Seo-hee are digging into the secrets of the people involved revealing the truth about the death of Kim Seung-cheol (Kim Jong-soo) and the disappearance of Sang-hoon (Lee Joon-hyuk) in OCN's "The Lies Within." Since the last 8 episodes, Seo-hee confessed to Tae-sik for the first time that she had received a message from the killer and expressed her desire to fully cooperate with the investigation.
The killer left a note with the number "0214 0303 0306'" to Seohee. 0303 marks the day that Seohee's father Kim Seung-cheol (Kim Jong-soo) died and 0306 was the day her husband, Sang-hoon Jung (Lee Jun-hyuk), disappeared. Tae-sik and Seo-hee were convinced that 0214 also represents a date, and Seo-hee confirmed that she visited a funeral home on February 14 through Sang-hoon's car navigation record. Seo-hee visited all the family members on the list who had funerals on that day and eventually found a name, Choi Soo-hyun, that was related to Sang Hoon.
At the same time, Tae-Sik remembered that Choi Soo-hyun committed suicide due to depression. When he reassessed the case report, he realized that he had ignored the family's claims about Soo-hyun's usage of antidepressant medications. He then approached team leader Dae Yong (Lee Jun-hyuk) and requested if an autopsy could be done. It turned out Choi Soo-hyun's death wasn't suicide.
What kind of secret will Taesik and Seohee discover? And what truth will be revealed when all the pieces fit together? Keep Watching "The Lies Within" every Saturday and Sunday at 10:30 pm KST on OCN and Netflix.