Ye Xiaocong, the last heir of a secret fragrance clan, goes undercover as a maid in the Pingyuan Marquis Mansion to find the key ingredient for a legendary resurrection incense. There, she meets Bai Zhangshu, the marquis, but is mistaken for a northern spy. Through a series of humorous misunderstandings, the two bicker and clash, yet gradually grow closer. As they face life’s challenges together, their relationship deepens, turning them from quarrelsome rivals into a loving couple.