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.

When you happen to save the man that annoyed you the most and he wakes up with amnesia, what kind of love-hate relationship will it bring? Domineering CEO Ning Cheng Ming has a reputation for being a professor from hell. After a mysterious car accident, he is saved by Li Qian, a person that he hasn't seen in years. They were enemies. She was a witty student and now an all-around secretary

Shan Junhao is the CEO of Senwell. He's a hard-hitting leader who never takes half measures to achieve what he wants. He's encounter with Ye Qianyu is not a pleasant one as he has mandated the closure of the Guanmei Inn, a place that Ye Qianyu holds dear. When Shan Junhao gets into an accident and wakes up with no memories of the past, Ye Qianyu takes him in and gives him a fake identity. They grow closer through their time together even though she knows that one day, he is bound to leave.

A romance between a narcissistic young master who loves no one but himself and his witty maid who has worked for him for years. When the heart beckons, what ensues is a sweet and hilarious story of pursuit. The young master of Qianyun manor, Mu Juechen is a leader among men. Not only does he have extraordinary talents but he also possesses a chivalrous heart. Through his efforts, the pugilistic world lives in harmony and he is hailed a hero. In his own eyes, he regards himself as the most perfect man.