In the majestic palace, the undercurrent of power surges. The second elder brother Li Chengqian, as the eldest son, has been regarded as a strong contender for the throne since he was a child. However, as he grew up, he found that the road to the throne was full of thorns. The fourth elder brother, Li Tai, was talented. He attracted many literati with his literary attainments, and he was also determined to win the throne. Above the court, the ministers each have their own masters, and the two forces are at war with each other. Li Chengqian and Li Taiming fought secretly, and their methods became more and more ruthless. Li Tai designed to frame Li Chengqian for rebellion, causing him to be imprisoned. At the critical moment, Li Chengqian's advisers turned the tide and exposed Li Tai's conspiracy, and Li Tai was imprisoned. But deep in the palace, various forces are still secretly watching, and this fierce game surrounding imperial power is far from over.