The main content of "Underground and Aboveground": On the eve of liberation, Liu Kehao, commander of the reconnaissance company of the Eighth Route Army, was ordered to pretend to be Qiao Tianchao, a staff officer of the captured Kuomintang Military Command, and won the trust of Xu Yinchu, the station commander, at the Northeast Station of the Shenyang Military Command, obtained a lot of confidential information, and made outstanding contributions to the smooth liberation of Northeast China by our army. In order to avoid the suspicion of the Kuomintang, the organization sent a female guerrilla leader, Wang Yingxiang, to pretend to be Qiao Tianchao's wife, Wang Xiaofeng, to "reunite" with him. Two enthusiastic revolutionary youths have the same ideals and goals, but they have different personalities and styles. They share the risks in the battle and bump in life. After liberation, they went through several twists and turns, and they laughed and became married. Newly married Yan'er, the Korean War broke out, Wang Yingxiang asked to participate in the war, and later, unfortunately died, leaving her husband and son with endless nostalgia...... It was the years when passion burned, and it was the age when roses bloomed.