Li Hongzhong, the orphan of Yuantian Dao who destroyed his family, married his junior sister Shi Qiancui ten years after inheriting his master's orders.After ten years of sharpening his sword, he became the youngest Celestial Master in Daliang. He went to Kaedeng to fulfill his promise, but his engagement was broken off.Murder cases occur frequently in Shi Mansion, and the tactics are very similar to old cases. Li Hongzhong vows to solve the mystery, avenge his master, protect his junior sister, and find out the real murderer behind the scenes.