Yunho, a cold-faced and handsome killer, transforms into the personal bodyguard of Qianjin Yaoyao.
Yaoyao, the eldest daughter of a wealthy family, is arrogant and makes things difficult for Yunho in every possible way.
However, in crisis after crisis, Yunho showed his super strength and saved Yaoyao from fire and water again and again.
From the initial tit-for-tat confrontation to Yaoyao's secret love, their relationship quietly sprouted amidst dangers and challenges.
What seems like a simple protection mission has a huge conspiracy hidden behind it.
Can Yunho uncover the mystery and protect Yaoyao?
