This is the untold story of the National Security Bureau, and the journey and memories of unsung heroes who lived in the shadow of daily life in an unforgettable period. This war fought in silence is motivated by unwavering faith and untold sacrifices. 　　常生活之下的暗影，真实国安故事再现，无名英雄的历险，不能忘却的时代英雄记忆，隐蔽的战场上无声的牺牲与崇高的信仰。