A police special agent, Han Xiao, was working as an undercover agent in a gang involved in crime. The group's elder, Zhan Bangdao, kidnapped the wealthy second-generation and attracted a special police team to surround them. The robbers led by Zhan Bangdao were all killed. Han Xiao narrowly escaped death, causing Wei Ge's deathSuspected, Wei Ge arrested Han Xiao and subjected him to severe torture. Han Xiao used his acting skills and intelligence to play against Wei Ge, worked hard to clear the suspicion, gained Wei Ge's trust, and continued to undercover in the underworld