Zhai Mingyuan stepped into the dead end overnight with a case risk sandbox that could predict evidence gaps. Operation Tazhai is suspected of leaking secrets, and the peripheral informants are about to be exposed. Lin Yaodong, Qi Tongwei, and Shanshui Jiuwang are all waiting for him to step on the trap. He did not rely on force to break in, but only blocked the action group, checked the call list, and filled in the confidential receipt, turning the red dot into irrefutable evidence that he could be involved. In the third chapter, the traitor Feng Qizhou was eliminated, the informant was rescued, and the leadership of the Tazhai project was seized.