故事的背景发生在抗日时期，故事讲述的是抗日时期所有战争的一个缩影。在1941年1月份，八路军第115师教导三旅特务三营接到了一个特殊的任务。任务要求是掩护首长机关的撤离，并且在指定的位置对日本人进行狙击

这个任务并不轻松，首先面对的日本人数量要比特务三营的数量多好几倍，其次装备方面也要落后日本人很多，面对日本人的不断冲锋，特务三赢的所有战士都坚守防线，没有退缩一步，子弹打光了，就用自己的身躯去抵挡，最终包括营长在内的所有战士一共126名全部牺牲。他们的牺牲换来了更多的时间，成功掩护了首长和群众的热力，这个任务他们超额的完成，但是付出的代价是非常惨痛的。这场战斗打的十分惨烈，但是他们仅仅是抗日战争当中的一个缩影。

The background of the story took place during the Anti-Japanese Period, and the story tells a microcosm of all the wars during the Anti-Japanese Period. In January 1941, the 115th Division of the Eighth Route Army taught the Third Brigade and the Third Battalion of Special Agents to receive a special task. The task requirement is to cover the evacuation of the head office, and to snipe the Japanese at the designated location

This task is not easy. The number of Japanese is several times higher than that of the Third Battalion of the Secret Service. Secondly, it is also much behind the Japanese in terms of equipment. Facing the continuous charge of the Japanese, all the fighters of the secret service three wins stick to the line of defense and do not back down. When the light was gone, he used his own body to resist. In the end, all 126 soldiers including the battalion commander died. Their sacrifice bought more time and successfully covered the enthusiasm of the chief and the masses. They overfulfilled this task, but the price they paid was very painful. This battle was fought fiercely, but they are only a microcosm of the War of Resistance Against Japan.