根据徐瑛同名小说改编。 1964年,我国南方某镇向阳院里的红领巾,由退休老工人、共产党员石爷爷带领,响应毛主席的伟大号召,在暑假期间,开展了学习雷锋、参加集体劳动的活动。石爷爷带着孩子们走进社会大课堂,去建筑工地扒砂礓,培养他们积极参加社会生产劳动的思想。他们的这一举动,受到了一贯坚持反动立场的阶级...敌人胡守礼的仇视。他利用个别家长的旧思想,采取各,采取各种恶劣的手法,从思想上腐蚀孩子,破坏活动的开展。在镇党委的领导下,在学生家长的支持下,石爷爷引导孩子们积极参加革命斗争,同孩子们一起粉碎了胡守礼的破坏活动。胡守礼贼心不死,竟然下毒手制造了山洞塌方事件,妄图伤害孩子们,并企图嫁祸于石爷爷。在千钧一发的危急时刻,石爷爷赶到现场,冒着生命危险,保护了革命后代,揪出了这个坏蛋。在这场斗争中,孩子们经受了风雨,见了世面,健康茁壮地成长起来。
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