Ling Chen, the sword master in the tribulation period who once looked down on all living beings from the nine heavens, unexpectedly fell under the last ascending thunder. His soul tore through time and space and was reborn in a modern city called "Haicheng", possessing the body of a young detective who had just died in the line of duty.
This world has no aura and no Taoism, but there are many mysterious cases that remain unsolved. The most troublesome thing is the serial disappearance case code-named "Crimson Butterfly" - the victims all disappeared in the secret room, leaving only a strange crimson butterfly mark at the scene.
Ling Chen's partner is Su Qingying, the most famous iceberg beauty and criminal psychology expert in the Haicheng Police Department. She believes in logic, data and evidence, and is full of doubts about this new "Ling Chen" who always uses mysterious and mysterious "intuition" to judge the case.
