He is a policeman, and Wu Liang, Song Yan has a good reputation in the police world. He has been different from others since he was a child. His family experience has kept him in the shadows since he was a child. His father is a policeman, so he has many enemies. His mother was taken as a hostage, and his father took himself as a hostage. However, the rescue was unsuccessful. His father died in the line of duty, and his mother could not bear the blow and committed suicide. He was adopted by his father's old partner, and he and Song Yan were childhood sweethearts. When they grew up, they became a legend in the police world! !