1944年,德军投入重兵守卫南斯拉夫境内的一座大桥,党卫军上校霍夫曼博士处心积虑防止南游击队的攻击。同一时间,游击队少校“老虎”(Velimir 'Bata' Zivojinovic 饰)接到上级命令:为阻止德军汇合,必须在七天之内找到建桥工程师将桥炸毁。老虎与老战友——爆破专家扎瓦多尼(Boris Dvornik 饰)以及他的助手班比诺、沉默寡言的战士狄希、曾参与建桥的游击队员曼纳,组成了一支行动小队。老虎从盖世太保手中救出工程师,在接近大桥的过程中与德国护卫军队发生激战,有游击队员与联络员牺牲了,但也有新的力量补充进来。在破解了德军的间谍渗入之后,游击队员们终于将大桥炸毁。In order to check German offensive, Partizans send elite team of explosive experts to blow up strategically important bridge. Besides being heavily guarded, that bridge is almost indestructible and the only man who knows weak spots in the construction is the architect who built it. He is, however, reluctant to cooperate because he doesn't want to see his masterpiece destroyed.