瑞奇森是一个热爱潜艇事业的舰长,他驾驶的潜艇被日本的战舰击沉,而他幸免遇难,但却被免职而从事陆上工作。 后来他又重新得到一艘潜艇的舰长的位置,他苦训官兵,大家由一开始的不理解到崇拜,在他的新战术下,他们勇敢地来到第七区,也就是在这个区,美国的潜艇多次被日本击沉。他带领大家运用新战术击沉了日本的战舰,但在一次战斗中,他们的潜艇险些被击沉,而舰长也受重伤,副舰长负责起指挥工作,在舰长的帮助下,他们利用勇气加智慧,击沉了日本的潜艇。获得了胜利。 但舰长也因伤重而光荣牺牲了。The captain of a submarine sunk by the Japanese during WWII is finally given a chance to skipper another sub after a year of working a desk job. His singleminded determination for revenge against the destroyer that sunk his previous vessel puts his new crew in unneccessary danger.