A series of extortion cases occurred in Shuangqing City. Judging from the information available to the police, the suspects used phone cards that did not require real-name registration and took photos of the ladies at the desk to extort money. The person who withdrew the money was wearing takeout clothing and a motorcycle hat. The police made several early warnings but still allowed the suspect to escape. As the police were getting closer to the truth step by step, the suspect was accidentally arrested due to a report. As a series of information accumulated, the person responsible for investigating the case discovered that the case itself was not the fault of the captured suspect. In order to find out the real culprit, he tried various efforts, and greater dangers were around him. A zero-sum game with no winning or losing becomes reality. There is a tense competition between people all the time, and everyone is faced with one choice after another. The world is not so simple, black and white, and there are no pure good guys or bad guys. Everyone has his fragile side and his crazy side in his heart. Life is just an accident one after another, a cycle of cause and effect, sowing good causes leads to good results. Unfortunately, not everything goes as planned, and sometimes all efforts are in vain.