儿童团员铁蛋一心想打鬼子。因为铁蛋的鲁莽，八路军缴获的武器被红枪会夺走一半，还险些让爷爷丧命。在八路军冯先生的引导下，铁蛋逐渐成长，帮助八路军成功收编红枪会，并将县城的日军大队一举歼灭。
遇播放卡顿或无法播放时，可切换线路播放
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