A detective uncovers a series of murders and discovers that the culprit is his own subordinate, who betrayed him years ago during a secret mission.
In order to avenge her family, innocent girl Qing Cheng was trained to be a cold-blooded killer. After several murders, she decided to let go of her grievances and spend the rest of her peaceful life in Anle Village, where she met the kind Bang and tied the knot. While Qing Cheng lives a dull life hiding her martial skills, Jianghu sinks into another wave of turmoil. In order to maintain the peace of Anle Village, Qing Cheng stepped up again and became the guardian of the village.