During the period of Anti Japanese war in Hebei Baiyangdian, naughty a boy Zhang Ga (Anges) see grandma to cover the Eight Route Army fled after the Japanese troops killed, came to town to find the guerrillas platoon leader Luo Jinbao (Zhang Ying), let him help grandma revenge, which want to really meet the Luo Jin Bao, he will each other as traitors, downtown the joke. After the termination of the misunderstanding, Zhang Ga dreamed of becoming a small eight road, and want to have a gun, the result too want to get the gun, he not only in and Humpty Dumpty (Wu Keqin) bet to depend on, also in violation of discipline will be a battle captures the real secretly hide in a tree nest, then the joke.
Zhang Ga can't be a joke when a joke, think impassability him about who came to the town, to a vengeance for grandma. In the county seat, Zhang Ga met the devil turtle Tian (Ge Cunzhuang) and fat translation (Wang Shu), a battle of wits, two people not from Zhang Ga who make what benefits. A series of things through, Zhang Ga by reckless mischievous teenager to true Eight Route Army small scout.