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

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".

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.