A leisurely picnic takes a tragic turn when Ramlah sees a mysterious figure abducts her son and disappears. Shortly after, she begins encountering une

辽沈战役前夕，隐藏在北平警察局里的地下党员郑朝阳因叛徒出卖不得已紧急撤退。同时带走了国民党精心准备的地下潜伏名单。