故事描述一美国军舰在运送物品的途中遭德国潜艇的攻击,舰队全体官兵纷纷奋勇应战,于是展开一场凶斗Lieutenant Joe Rossi is 1st Officer on a Liberty Ship in a great convoy bound from Halifax to Murmansk. After German subs crushed the convoy his ship loses the convoy and is heading alone to Murmansk. In spite of attacks by German planes and subs he get the ship safely to Murmansk...