劇情講述一位成為了超級巨星的保鑣後，多才多藝的謎樣男子，及他所捲入的事件該如何被解開的故事。
A longtime celebrity Yeo Woon-gwang (Park Sung-woong) suddenly has a need for a bodyguard and hires Kim Seol-woo (Park Hae-jin), a man trained in special investigations and a mysterious man of many talents. In reality, Seol-woo is a NIS black ops agent who has his own agenda and the role of bodyguard is only a cover to achieve his goals. The drama is about the twisty events they encounter and the budding bromance between the star and bodyguard. In addition, Seol-woo gets romantically involved with Cha Do-ha (Kim Min-jung), the manager of Woon-gwang.