Mu Qingmian, who is known as the "evil girl", protects her loved ones and resists injustice with a fierce attitude. Her marriage to Shen Yanqing, the eldest son of the Dingyuan Marquis Mansion, began with an agreement, but true love grew as they faced family disputes and court dangers side by side. Mu Qingmian sticks to his true intentions and punishes evildoers, while Shen Yanqing puts aside her frivolity and protects her wholeheartedly. Her sister Mu Qingcheng is her most solid support.