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

Yoon Shi-yoon, Jung In-sun, Park Sung-hoon, Lee Han-wi, Hwang Hyo-eun, Lee Min-ji, Choi Tae-hwan, Han Soo-hyun, Oh Chae-eun