The strongest assassin, Li Yan, takes on his 99th mission: protecting Shen Qinghe, the eldest daughter of the Shen family. On his way back to China, he happens upon Shen Qinghe being hunted and decisively rescues her. The two immediately have a minor disagreement. Shen Qinghe proposes three rules for their relationship, but Li Yan responds domineeringly, “You are the one who obeys me!” After repeatedly clashing and protecting her at close quarters, Shen Qinghe gradually falls for Li Yan and shows him a uniquely tender side. Watch how Li Yan and this distinguished young lady join forces to command the urban world, turning the tables at will, and ultimately become a devoted couple.