The BEST seasons of Psychopath Diary

Every season of Psychopath Diary ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Psychopath Diary!

Yook Dong-sik coincidentally witnesses a murder and picks up the killer's diary. While fleeing the scene, he gets into a car accident, which causes him to lose his memory. Due to the diary in his possession, he mistakenly believes that he is a psychopathic serial killer.