TvN drama series “Psychopath Diary” starring Yoon Si-Yoon, Jung In-Sun and Park Sung-Hoon. Teaser trailer #7 focuses on Park Sung-Hoon as serial killer Seo In-Woo. He starts off the teaser trailer with narration that says in Korean “Lost diary. It is my diary which nobody should see.” Meanwhile, below are still images of Yoon Si-Yoon in the drama series. The still images are from a scene where Yook Dong-Sik (Yoon Si-Yoon) goes to a crime scene where he witnessed a murder prior to losing his memory. 


“Psychopath Diary” first airs November 20, 2019 in South Korea.