When the heiress Ling Yan loses her memory in a car accident explosion, Xiao Ye, a retired top assassin, takes the opportunity to hide with her in a remote border town, claiming they are cousins. The once spoiled and willful Yan is forced to adapt to the impoverished life in the small town, often complaining about the living conditions, but gradually becomes dependent on the stubborn and ruthless Ye. While Ye appears cold and sarcastic, he silently shields her from harm, fixing the house, changing her medicine, and fending off harassers, all while hiding his assassin identity to keep her safe.