A young carpenter is in love with a girl from the village of Erhai but she wants a wealthier suitor while another girl loves the carpenter but knows he doesn't love her.
In the spring of 1949, a war is about to happen between the Liberation Army and Kuomintang Army on the Yangtze River. The Liberation Army dispatches a reconnaissance to scout the southern parts of the River, whose work is actually full of hardships and dangers. However, with the help of the local crowd and the guerrillas, finally, the members of the reconnaissance succeed in the commission and offer valuable information to the Liberation Army, making great contributions in the war.
Before the liberation of Shanghai, Nationalist agent Zhang Rong is ordered to blend in with the captive workers of the Baotong Mill and wait for a chance to act. After the liberation, he returns to the factory, disguising himself as a far-left agitator and causing friction between the workers and management.
