Season 1
Yook Dong Sik works at a brokerage company. He is a pushover and a fool too naïve and kind-hearted for his own good. Dong Sik is at a point in his life where enough is enough and goes to end his life. However, the place he chose to end it all was a place where a murder was about to happen. As he flees in fear, he gets into an accident, and the following day, doesn’t remember a thing in his past. The only clue he has about himself is a red diary he unknowingly took. The journal contains details of all heinous killings of a psychopathic serial killer. Being an innate fool, he mistakenly begins to believe that he is a psychopathic serial killer, and the world he once knew changes drastically.
Episodes
1 Memory Loss Nov 20, 2019 
2 I Am a Predator Nov 21, 2019 
3 I’m Coming for You Nov 27, 2019 
4 You and I Are the Same Nov 28, 2019 
5 He’s Not Who He Seems Dec 4, 2019 
6 Who is the Real Killer Dec 5, 2019 
7 A Copy Cat Killer Dec 11, 2019 
8 Closed Case Dec 12, 2019 
9 It Wasn’t Me Dec 18, 2019 
10 The Killer Inside Me Dec 19, 2019 
11 I’m Not a Nice Guy Dec 25, 2019 
12 The Confession Dec 26, 2019 
13 Jailbreak Jan 1, 2020 
14 I Remember Jan 2, 2020 
15 The New Chairman Jan 8, 2020 
16 The Final Battle Jan 9, 2020