While exploring Maoling in Xianyang, Xi'an, the heroine Ruo Anran transmigrates to 138 BC, the second year of the Jianyuan era. Looking just like Yin Liyi, she is sent into the Han palace by the Yin family as a household servant. Impressed by her intelligence, Empress Dowager Dou assigns her to serve Emperor Wu, Liu Che. Drawing on modern civilization and her keen mind, Anran helps the emperor achieve his grand ambition for the ages. But she struggles on the edge of her relationship with Liu Che, finding it difficult to choose between love and survival. Her devotion and possessiveness ultimately lead to her death, and she returns to the modern era. Yet she cannot overcome her longing for Liu Che, and transmigrates once more. Only now, everything has changed: she arrives in the first year of the Taichu era, 104 BC, and their reunion becomes one between an old man and a young wife…