Time Travel: Strange Cases of the Southern Song Dynasty

[Time Travel] [Suspense] [History] [Case Solve] When I woke up, I became a down-and-out scholar in Lin'an City in the Southern Song Dynasty. He wanted to just eat and wait for death, but he was involved in a strange murder case. The deceased left a poem on his pillow, but the murderer was actually a shadowless man under the moonlight? I casually stated my reasoning, but was treated as a guest of honor by the current executioner. Since then, my daily time travel has turned into traveling all over the world, specializing in investigating strange cases. And behind every case, it seems to point to the same legendary book...