Su Qingqing, a modern society animal, died suddenly and traveled through time. She turned out to be the cannon fodder concubine of the household minister's family. She also accidentally took away the first night of Xiao Jue, the God of War, Prince Jing. The rumored cold and bloodthirsty prince, pinching the plastic button she left behind, became interested in a woman for the first time.
In order to get rid of her original family, Su Qingqing signed a "cooperation contract" with Xiao Jue, but in the ridiculous relationship, she used milk tea cakes, modern tactics and novel insights to melt his frozen heart little by little. When childhood sweethearts provoke and intrigues arise in the court, Xiao Jue declares in public that "she is the only concubine of my king." Jealousy abounds and feelings grow stronger.
She unexpectedly discovers that the mystery of her life experience is actually the blood of the royal family living among the people; he is deeply framed by political opponents, and she uses modern wisdom to help him break the situation. From a contracted couple to a life-and-death dependence, from the first encounter in a private courtyard where they grow old together, the cold prince transforms into a maniac who dotes on his wife, and crosses paths with the concubine to counterattack and become a legend.
When she returns to modern times with her memories, the jade pendant on her wrist guides the direction of reunion. This sweet love that spans time and space hides the most touching promise: eternal love that spans thousands of years.