During the Anti-Japanese War, a group of desperate criminals gathered in the northern plains. Led by their leader Fang Youwang (Huang Xiaoming), they established an underground kingdom and made a living by robbing. One day they kidnapped a groom, Gao Dongliang (Zhang Yi), who was on his way to get married. Unexpectedly, Gao Dongliang was a tough guy. He quickly conquered the entire gang with his bloodiness and wisdom and became the "second in command". He developed feelings for the leader's sister, "Little Aunt" Fang Zizhen (Zhang Xinyi), and persuaded Fang Youwang to go against the Japanese invaders, starting with kidnapping the "Emperor's younger brother" who came to the front line for inspection. After careful planning, this group of villains with a long history of crimes took on the "duty of a man" and sneaked into the Japanese camp with weapons and flesh and blood in their hands, trying to make a big move...