On her wedding day, a bridal sedan is accidentally sent to the wrong residence. Su Manli was supposed to marry Lu Huaijin, but instead she enters Prince Yu's manor and becomes the wife of the frail Xiao Jingheng. Everyone laughs at her for being naive and foolish, yet she remains devoted to Xiao Jingheng, standing by his side as they investigate the truth, expose fraudulent contracts, reclaim the horse ranch business, and unravel layers of conspiracies. Their arranged marriage is now a thing of the past. Together, they weather one crisis after another, gradually developing genuine feelings as they support each other.