Shen Yu is a mute male servant who disguises himself as the daughter of the Shen family and takes her place when she is summoned to become a concubine of northern prince Jun Xuanxiao. He accepts the dangerous deception to secure a better future for his adoptive mother, knowing discovery could cost him his life. Instead of remaining unnoticed, Shen Yu attracts the prince’s attention and must protect both his identity and the person he sacrificed his safety to support.