Story of the leading regiment of the First Branch of the Chinese Red Army for Workers and Peasants who defeats a brigade of enemy on the Wu River and conquers the river by 3 days of intelligent combat.

Five soldiers of the Eighth Route Army fight heroically to cover the evacuation of local people from border area between Shanxi and Hebei provinces as the Japanese attack.

It is a story about the Chinese police who intelligently and bravely fight with the cooperation of the factory's Party Committee and the masses, against the spies, who steal the navy's equipment "Hunting No.99".

An underground CPC telegrapher, Li Xia, fights against the Japanese enemy and dies before the eve of Shanghai's liberation in 1939.