Shen Yuchu, the concubine of the Chancellor, was forced to marry Xiao Beihan, a well-known dandy prince in the capital, in order to survive a house fight and investigate the injustice of her biological mother. She thought her husband was a good-for-nothing who only listened to music and walked around. Until one night, she found this "waste" wiping his blood-stained sword and smiled lazily at her: "My beloved concubine, can you help me cover for my husband?"
From then on, the two people wearing masks were forced to walk together. She used her wisdom to break the situation for him, and he used his power to support her. Under the pressure of the prince and his beloved concubine, and in the emperor's deep and unpredictable imperial mind, they gradually became soul mates who used each other from a contractual couple. In the end, in the bloody battle for the right to inherit the throne, they worked together to uncover the fog.
