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.