1931年“九一八”事变后，日寇侵占东北，中国大学青年白乙化奉命潜回家乡辽阳，以教师身份为掩护暗中组织抗日力量。然而，行动屡遭威胁，敌我暗战交锋中，白乙化身份濒临暴露，生死一线。他能否在迷雾中揪出内奸，突破重围，扭转抗日危局？
遇播放卡顿或无法播放时，可切换线路播放
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