There are many immortal sects in the Eastern Wilderness Continent, and murders occur frequently. Jiang Yan is the chief judge of the Spiritual Law Department. He is a solitary person who is good at deducing cases. Qu Xiaoman is an orphan from a theater troupe. He is born to act, but his lies come true. He has the fate of "liar". She was involved in the murder of a substitute and was forced to go with Jiang Yan. During the investigation, there is an undercurrent of evil spirits, and the truth is difficult to discern. He relied on the Book of Broken Worlds to pursue the murderer, but she used lies to break the situation. One is cold and the other is hot, one is quiet and the other is noisy, working together to solve strange cases. As the road goes farther and farther, love quietly grows. If the case is not solved, the oath will not stop; if the lie becomes true, the fate will be reversed.