Jet Lag Game

In a different timeline, the protagonist Zhang Linghe, as a private detective, accidentally obtained a system for tracing back cases, and this system allowed him to win many battles. He thought he would always win, but he encountered a "ghost" during the single-family house murder case. It seems to be just a villain organization, but... Why is there still something supernatural! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.