In 2025, the soul of criminal police officer Chen Tianming penetrated into the body of trainee police officer Chen Mo of Blue Star in 2005. Faced with the backward technology of fingerprints relying on powder and monitoring relying on playback, he used 30 years of on-site investigation experience to make a hard-core breakthrough: from the half piece of nylon fiber of the corpse of a woman in a red dress on a rainy night, he identified the taxi driver serial killer; he used the mechanical scratches of the secret room door lock to expose the neighbor's disguised conspiracy to hide the corpse. When his colleagues in the old time and space laughed at him for "looking like a detective from the future", he stared at the radiation burn marks on the photos of the scene - this journey of chasing the murderer across technological generations was opening the bloody page of a notebook stained with fingerprint powder.
