In the 15th year of Qingshuo, Princess Li Conghuan of Zizhou marries Crown Prince Mo Heng, but her true motive is revenge. Once in love with the Second Prince, Mo Jin, she witnessed the brutal murder of her mother and her newborn child. Returning to the palace, Li Conghuan is determined to avenge their deaths, but her former love, now the Crown Princess' husband, struggles to believe she would go to such lengths for power. Caught in a web of assassination attempts and suspicion, the two must navigate misunderstandings and hidden intentions as their paths intertwine once more.