Main plot: The protagonist Lu Zhen, a genius who grew up in an orphanage, relies on his photographic memory and terrifying logical reasoning ability to open a private detective agency in the fictional city "Jiang City" where dragons and snakes are mixed. With a thunderous start, he cracked a secret room murder case that was defined as a "perfect crime" by the police, and became famous in one battle. As he took over seemingly bizarre cases one after another - from the serial threats of "campus ghosts" to the mysterious disappearance of wealthy heirs, from the copycat murders of "urban legends" to the sky-high price theft of artworks - he found that all the clues secretly pointed to a huge black hand hanging over Jiangcheng. This organization is not only closely intertwined with the city's powerful and gangsters, but is also inextricably linked to the "accident" in which his parents died mysteriously. Lu Zhen walked on the edge of the knife, teamed up with the calm and rational forensic doctor Su Wan, peeled off the layers of disguise, and used his wisdom to send criminals to the trial seat. Finally, he uprooted the dark force that could subvert the entire Jiangcheng, and revealed the ultimate truth about his life experience.
