日据时期，教师黄三向学生晓以民族大义，因而触怒日军，被迫逃亡。一日，黄三在街上遇一名日军追捕贼匪，黄三企图阻止日军开枪，怎知却错手将日军杀死。黄三无处容身，终跟随贼匪返回巢穴，从此沦为盗贼。一次，黄三与同党盗进大宅打劫，竟发现主人原来是黄三当年的学生王仲康。黄三获悉仲康奉命替游击队购买大批军火，于是决定助仲康盗取日军的火药。黄三的同党一直妒忌黄三深得老大信任，得知黄三的计划后，竟然暗中向日军通风报信。黄三联同仲康等人来到日军火药库，与日军激战起来。最后，仲康等成功地将军火运走，惟黄三却在战斗中牺牲。

Teacher Huang San extends to his pupils the high principles of patriotism, thus arousing the hatred of the occupying Japanese. Huang is forced to flee and to escape from the Japanese clutches. One night, he helps a robber escape from a pursuing Japanese officer by firing his gun and thus unintentionally kills the Japanese. Huang San follows to his hideout and from then on, Huang San joins the bandits. Huang San attempts to rob a house but discovers that the occupant is none other than his student Wang Zhongkang who is involved with the guerrillas. Huang San decides to help Zhongkang raid the military arsenal of the enemy. However, as Huang gradually gains the trust of their chief, some jealous associates within the bandit group informs on him. Huang and Zhongkang carry out their raid amid a fierce confrontation, Zhongkang successfully implements his mission but Huang is killed in the battle.