1934年，国共之争陷入僵持，黑暗的斗争转入地下，各国亦暗中培育间谍组织，企图进一步瓜分中国。国民政府为巩固政治权利，在上海这个列强割据、黑帮混杂之地建立青山军校，以防止各种势力蔓延。校长蒲丛依靠青山军校编织起一张庞大的情报网，立于信息战不败之地。青山军校内，顾盼、田桥洁皆为学员中翘楚，两人相互竞争又互为知心姐妹。顾盼与教官谭仲文秘密相恋，却不知田桥洁亦倾心谭仲文已久。顾盼得到青山军校暗中指令，命其独自执行暗杀日本文化司司长神谷浩二的任务。日本文化司司长神谷浩二前来中国，松本带领罗星明和龙智捷所属的行动队前去火车站接站，却不料神谷浩二被青山军校特工顾盼枪杀。任务完成后，顾盼却成为弃子，被以龙智捷、罗星明为首的日本使馆武官队追杀。蒲丛将顾盼冠以叛国罪之名，推向不可翻身的死地。与此同时，实为爱国人士的罗星明，受命寻找顾盼，查明神谷浩二死因。蒲丛捏造顾盼叛变证据，派遣田桥洁出面追杀顾盼，龙智捷、罗星明带领日本使馆武官队赶到。混战中田桥洁因爆炸身亡，顾盼重伤逃生。

The day before the high school Korean archery competition, Hyungchul, a beekeeper, enters the archery range forest to remove a hornet's nest where his son Wonyoung practices. Meanwhile, Wonyoung, who has had conflict with everyone around him that day, shoots an arrow at the bag containing hornets, causing everyone to get stung, including himself.