Xiao Zhan, a special soldier, worked as a security guard after retiring from the army. When a gangster robbed a bank, he was forced to show his "military style boxing" (actually an ancient martial arts), which attracted the attention of the official martial arts bureau. He joined the "Urban Guard" to fight against the "Shadow Pavilion" who smuggled ancient martial arts secrets, but found out that the leader of the Shadow Pavilion was the comrade who framed him for retiring. In the end, Xiao Zhan used "Baji Fist" to defeat the leader, regain the secret book, and became the captain of the guard.
