Lu Chen was once an ordinary person in the city who made a living by repairing cars. His only weakness was his mother who was paralyzed in bed. It wasn't until his mother fell down the stairs due to an "accident" that he discovered from the surveillance footage that it was real estate developer Zhao Kun's men who were behind the demolition of the old house - and Zhao Kun was the culprit who forced his sister to death.
Unable to swallow this, Lu Chen intercepted Zhao Kun on a rainy night and smashed him to death with a wrench. Unexpectedly, the political and business network behind Zhao Kun had already been laid out. The court sentenced him to ten years for "intentional homicide". During the trial, he was supposed to be sentenced to death, but because of the sudden participation of Zhao Kun's cousin Director Li, the death penalty was sentenced to life imprisonment.
On the first day after being imprisoned, Lu Chen stood firm with his powerful martial arts, but in the dead of night, he repeatedly rubbed the old watch his mother left him. Who knew that this man with a strong appearance could have such a weak temper underneath? Lu Chen is not willing to live in prison like this all his life. He keeps making friends with brothers in prison. He wants revenge. Everything he has to do is to overturn this network of evil and evil with his own hands on the day he is released from prison...