1936年,山西董(✒)家(🐽)生产(chǎn )的熟铜(tóng )成为兵(🌰)家必(bì )(🕋)争的战略物资,日军因(yīn )此展开了“樱花(🛤)计划”。董家(🐮)二(🥩)少董守(🎾)旺在危机(jī )关头劫富济(jì )(🏇)贫(pín ),却无意(🖲)中(zhōng )破坏了地(dì )下党(dǎng )组织的购(gòu )买熟铜(tóng )的(de )计划。中共地下党(dǎng )员(yuán )齐颖临(🎿)危受(🥞)命,想(🍮)要(yào )通(tōng )过与董(dǒng )(🖍)守旺(wàng )的(de )同(tóng )学之谊完成计划。董守旺(🧚)因爱慕齐颖而全力援手(🖲),过程中却发现(xiàn )齐颖之(🥔)父(💻)马其(🙂)隆等人与(🐑)董父之(zhī )死有(yǒu )直接关(guān )系,愤(💪)怒中行刺却落入对(duì )方陷(xiàn )(🧤)阱(jǐng )。齐颖和董(dǒng )守旺的精神(shén )(🤳)教(🎋)父(fù )关建云冒着生命危险将其救出,关(💝)建云因(yīn )此遇害。董(dǒng )守(🚗)旺(wàng )悲痛之余(➡)放下家(🌹)仇(⛏),协(xié )助齐颖为抗日(rì )先遣队(duì )谋(🐩)取熟(shú )铜和枪(qiāng )支弹药(🐡)。两人逐渐从冤(yuān )家到相(xiàng )依相帮,历(👵)经磨难,立下奇功,最(zuì )终不得不(🌱)炸毁(huǐ )(🐖)矿(🆙)场和(🔫)兵工厂,宁可远离家乡(🍁),也(👛)不做亡国奴。在齐颖(🐂)引导下,董守旺终于从一(🕺)个(💑)放(fàng )荡不羁的(🍹)纨(wán )绔子(zǐ )弟成(chéng )长为一名坚(jiān )定(🐈)的抗日(🔍)战士。