Wang Weiye (played by Daniel Wu), who has been a police officer for 17 years, was extremely uneasy because of his childhood and family. At the same time, he upholds an absolute sense of justice, so that he overcorrects his relationship with others and has many difficulties in communicating with colleagues.One night in the emergency room, Weiye gave a blood transfusion to a seriously injured patient who was in urgent need of rare blood type. Unexpectedly, the other party was Han Jiang (played by Zhang Jiahui), the leader of the Ghost King Party, a bank robbery gang.Weiye was condemned by his colleagues for this, and soon Han Jiang sneaked away and immediately led his accomplices to commit a heinous case. Weiye's colleagues were even burned to death in the firefight.People are doing it, God is watching, and the fierce and domineering Han Jiang never thought that he would be ruthlessly swallowed by desire.On the other hand, Weiye's mental condition became increasingly worrying. He refused to accept psychological counseling and persistently tracked Han Jiang's accomplices like a ghost.He witnessed betrayal and killing, and also sat down to see the collapse of his strong beliefs in his heart...