Modern audience Su Wan accidentally traveled through time and became the last Su Yao in "Ruyi's Royal Love in the Palace" who could hardly even see the emperor. She was well aware of the direction of the plot. She felt sorry for Jin Zhong, who sacrificed everything for Wei Yanwan in the play but met a tragic end. She was also disgusted by Wei Yanwan's sinister calculations, and she was completely resistant to the feudal court's sleeping system.
In order to avoid going to bed, Su Wan relied on modern pharmacological knowledge to mix drugs to get through. However, in the process, she met Jin Zhong who she cared about many times. As they get along, she discovers that Jin Zhong not only has a gentle background similar to the one in the play, but also hides a shocking secret - he is not a real eunuch.
On one side is the frightening harem battle. Wei Yanwan's ambitions are growing day by day, and she repeatedly points the finger at Su Wan, who is unpopular but unusually "comfortable"; on the other side is the quietly growing affection between Su Wan and Jin Zhong. The two have to hide their own secrets (Su Wan's identity as a time traveler, Jin Zhong's true identity as a man), and protect each other in the turbulent palace, trying to change Jin Zhong's tragic fate.
When Su Wan's drug strategy is almost exposed, when Jin Zhong's secret is in danger of being exposed, and when Wei Yanwan's frame-ups follow, can this special man and woman in the cage of the Forbidden City break through the shackles of identity and time, and find a glimmer of hope and true love deep in the red wall?
