The play tells the story of the struggle behind enemy lines in the very cruel northeast, a group of warm - blooded warriors formed steel thorn team, under the leadership of the Communist Party, tenaciously and Kwantung Army deal with the struggle of the story. After the outbreak of the war in the Pacific, desperate Japanese invaders attempted to do dying, the building known as the "Oriental Maginot Line" military fortress. The traitor Chen Wenhui in the hands of Japanese stronghold important intelligence, and a threat to the Japanese lurking in the internal party. Under the leadership of the Communist Party of China's Anti Japanese Amalgamated Army of the Northeast Snow Wolf knife team under the leadership of Captain Yang Ziliang, the assassination of Chen Wenhui, crazy and cunning enemy chieftain Sakata, insidious vicious spy pass by the beauty of the battle of wits douyong. The knife team experienced fighting hat Ling, clever attack gendarmerie prison, after the Jiulong River railway bridge, moonlighting Japanese Jin Jing division such as the head of the series of actions blew up, side of the comrades falling one after another, but they still persist in resistance, and ultimately achieve the Japanese stronghold map to guide the counterattack. Troops to conquer the military fortress, to obtain the final victory.