In the 1990s, Han Ye Wang Yong'an stood up for his brother and robbed his money from the casino. After he settled his brother's surgery fee, he was afraid that the incident would be revealed and he was forced to leave his hometown to avoid trouble. With extraordinary courage, he was invited to become an undercover agent, sneaked into the core of the criminal group, and embarked on the road to atonement in the name of justice.