The late emperor died suddenly, and the young prince Xiao Lin hurriedly succeeded to the throne during the national mourning period. On the night he ascended the throne, he entered the "late emperor's palace" for the first time to sort out his relics according to the ancestral rules, but he discovered a scene that made his hair stand on end: deep in the palace, four portraits of the "late emperor" with dragon robes and completely different faces hung side by side, and they were all marked as his biological father, the previous emperor. The portraits have different styles, as if they depict four different people and four different lives. In the palace archives and everyone's oral histories, there is only one late emperor. Xiao Lin instantly understood that what he inherited was not only a throne, but also a huge lie carefully woven. He must use his identity as the new emperor as a cover to launch a secret investigation alone in the turbulent palace without alerting any hidden enemies or exposing his knowledge of the truth. Clues point to long-shuttered documents, erratic behavior of former palace residents, and the seemingly harmonious but strange relationship between the court and court. As the investigation deepens, Xiao Lin gradually discovers that these four portraits are not just portraits, they correspond to the late emperor's four completely different secret identities and life trajectories, and all of them are related to a shocking old case that was completely erased twenty years ago. When he approached the core of the truth, he discovered that he was already at the center of the whirlpool, and that hidden "truth" was enough to subvert the foundation of the entire dynasty.
