In 1944, the National Army failed in the Changheng Battle. Fei Zhenxi, an officer who fought bravely against the enemy, was captured in a Japanese prisoner-of-war camp due to injury and coma. There, all prisoners of war not only suffered inhuman physical torture, but also suffered devastating psychological destruction. Fei Zhenxi fought wits and courage with the Japanese army many times in the prisoner-of-war camp, and was beaten by the Japanese army many times, but he still died for the country and for his beliefs. After experiencing a series of inhuman torture, Fei Zhenxi accidentally met Liu Feng, Feng Lao Da and other Communist fighters with the same patriotic aspirations, and was influenced by the spirit of the Eighth Route Army headed by Liu Feng and decided to join the Communist Party. In the end, everyone successfully smashed the Japanese conspiracy and led a group of prisoners of war out of the prisoner-of-war camp.