Liu Chuan, an expert on chemical weapons, came to Dingzhou County, Hebei Province to prepare for the final live chemical weapons test. However, Li Xiangyang ambushed him, and Scar, the robber's second son, took his lucky car. The third bandit was poisoned, and the thief Guo Xiaobei was about to be poisoned. Cui was caught by the devil to do a living experiment because of his big figure, but he escaped skillfully. Lao Hou and Er Scar were captured and were in danger. He used his quick wits to lead martial arts players to get through the test site, successfully rescued Lao Hou, Cui and Scar, and burned Japanese biochemical weapons.
Guerrilla expert Kant secretly trained a fake martial arts team, deceived Yang Dajiao, a chivalrous woman who claimed to be Li Xiangyang's daughter-in-law, and almost destroyed Li Xiangyang. The second child, Scar, rebelled and recognized Mulan, a special reporter who was tutoring at Matsui Shigen's house. Mulan was arrested and tortured. Fake armed forces went into the village to collect grain in an attempt to fundamentally destroy the survival foundation of Li Xiangyang. Li Xiangyang played along, using himself as bait, cheated the devil of a large amount of food, helped the victims, and used Matsui to destroy Kant and his fake martial arts team, killing the traitor's second child Scar, and Mulan regained Matsui's trust.
The anti-mopping-up entered the final stage, and the main forces in mountainous areas began to counterattack; Matsui was ordered to defend Dingzhou County, Hebei Province. He spent his whole life designing.
Strict county defense map and city defense map have become the key to the success or failure of the battle to break through the county. Kawako, a female agent in a special high school, kidnapped Matsui's nephew and came to the armed forces, where she won the love of Lao Hou. At the same time, a scorched earth plan that even Matsui didn't know was made. Yang Dajiao sneaked into the county seat in makeup, stole a fake map of the Yugoslav capital, and was wounded and captured. Li Xiangyang sent Matsui's nephew back, threatened with fake chemical weapons, and saved Yang Dajiao from dying. She died laughing in Li Xiangyang's arms. At the beginning of the tournament, Ding Datou died heroically, attracting the main force of the devil. Old Hou forged a secret order to let Watanabe kill his main force. Mulan was shot and killed by his students to cover Li Xiangyang, and Matsui was finally killed by Li Xiangyang's gun. Chuanzi died under the gun of Lao Hou, and the fuse of the unknown scorched earth plan was doused by Xiao Guo's urine. The general assault began, and Li Xiangyang cooperated with the main force to finally occupy Dingzhou County.