Watch: Yoon Shi Yoon Explores His Killer's Diary And Tests His Skills In New "Psychopath Diary" Teasers

tvN’s “Psychopath Diary” has revealed new teasers showing Yoon Shi Yoon’s exploration of his diary!

The drama is a comedy thriller about a man named Yook Dong Shik (played by Yoon Shi Yoon), a timid pushover who happens to witness a murder. While attempting to flee the scene, he suffers an accident that causes him to lose his memory. When he wakes up and discovers the murderer’s diary — which describes his crimes in detail — in his hands, Yook Dong Shik becomes convinced that he is a psychopathic serial killer.

In the new teasers, Yoon Shi Yoon tries to get to know himself through what he thinks is his own diary.

In the first clip, Dong Shik says, “This diary is telling me… that I’m a serial killer. And that I can overpower three adults in a fight.” Coming across a group of high school students, he beckons them over, but quickly finds himself running for his life. Meanwhile, Shim Bo Kyung (played by Jung In Sun) looks on from the sidelines, confused.

In the second teaser, Dong Shik says, “This diary is telling me… that I’m a serial killer. And that I can run four kilometers without getting tired.” In the next scene, Dong Shik stumbles toward a corner store, where he desperately grabs some water and sits, as he checks his watch to see that he has only run 312 meters.

“Psychopath Diary” premieres November 20 at 9:30 p.m. KST.