Princess Shen Zheng of the Kingdom of Shuo suddenly finds herself transported to the modern era, where she becomes the neglected eldest daughter of the Shen family. By a twist of fate, she ends up marrying Gu Yunting, the second son of the Gu family, who had come to marry on behalf of his brother. Struggling to adapt to modern life, Shen Zheng faces repeated schemes from her half-sister and the hidden threats from her manipulative elder brother. Together, she and Gu Yunting skillfully overcome these challenges, and their bond deepens as they grow closer. However, just as their relationship blossoms, Gu Yunting’s first love—his white moonlight—returns to the country with a strong presence. Faced with this dilemma, how will Gu Yunting choose? And where will Shen Zheng’s path lead her?