The story is based on a mysterious book called "Feng Chuan Nian in the Palace". It is said that anyone who gets this strange book will get the most beautiful phoenix crown in the world: When she was a child, she separated from her parents and studied alone on Moon Mountain. When she was fifteen years old and completed her studies, news came that her favorite queen sister was killed by Hu Guifei, which hurt her. In addition, she disguised herself as a palace servant and entered the palace to look for opportunities for revenge. Because of her sister's last words, she stepped into the Phoenix Palace. Life in the palace did not seem to be as easy as imagined. While dealing with the sinister, cold and arrogant emperor, she was also fighting with the concubines in the harem. On one side, there was the mystery of her life experience, and on the other side, there were strange and hidden grievances in the world. How can she cope with all this with her extraordinary appearance and intelligent heart? When she reached the peak of her power, she heard the truth about her sister's murder, saw the same-sex love between princes, and was framed by the princess. She was disheartened. Occasionally, she recalled the book that the mysterious person gave to her when she was a child...