To find out the mastermind behind a series of criminal cases, Cheng Xiaoshi asks for Xiao Li’s help to search for all hidden clues. But the murderer with unknown superpowers is in the dark and has never stopped his plot. Cheng Xiaoshi is followed by a young mysterious guy like a shadow, and his friends were killed one after another. And on several occasions, Cheng Xiaoshi’s life was in grave danger. As he goes deeper in the investigation, a murder case happened many years ago comes surfaced. But Cheng Xiaoshi and his partners are always in a passive position while engaging the murderer. Can Cheng Xiaoshi discover new possibilities in time again? The final battle is about to begin.