Someone has broken into Hou Jue's house. In the face of inexplicable death threats, Hou Zhirong who worries for his son's safety decides to hire security. While delivering some documents, Wu Shiyi accidentally saves Hou Zhirong and gets handpicked by him to become Hou Jue's personal bodyguard.

Hou Jue is immediately resistant to the idea of a female bodyguard intruding into his life. He makes things difficult for Wu Shiyi on purpose, yet she is not the type to easily back down. Over time, their relationship takes a turn for the better. Hou Jue's father becoming more controlling leads Hou Jue to finally leave and stand on his own. Now penniless, Hou Jue sinks into depression at the drastic change in his lifestyle. Yet to find the right person in a vast crowd is a fortune of three lifetimes.