Su Yan, an orphan who guarded the tomb among the people, was forcibly brought into the palace because she looked like the late concubine, and became the substitute for the emperor Xiao Chengyu to distract his thoughts. From passively accepting the "substitute grace", she gradually awakened in the strife in the harem. With the tolerance and insight unique to the tomb keeper, she dismantled the concubine's trap and deciphered the emperor's mind. When tracing the truth of the "death of the wise concubine", she accidentally revealed the secrets of the palace. When Xiao Chengyu discovered that his concern for the "substitute" had already crossed the line, Su Yan chose to retreat in order to advance, using a carefully planned "falling out of favor drama" to push the relationship that started with exploitation into the ultimate game of sincerity and dignity. The full text takes "substitute counter-kill" as the main line, interspersed with palace intrigues and emotional reversals, highlighting the exciting core of "how people who are regarded as shadows can live as light".
