Zhu Xiao came from a poor family, studied hard, and was admitted to a prestigious university at the age of eighteen. At the age of nineteen, he stole a classmate's cell phone and was sentenced to three years in prison by the court. In prison, he met Huazhu and Durian. After being released from prison, they entered society together, experienced a life that ordinary people could not experience, and became a veritable gangster.