1942年4月，二战时代，大西洋上，德军战舰采用“狼群”战术，令盟军丧掉惨重。美国水兵上尉泰勒（马修•麦康纳 Matthew McConaughey 饰）因抗敌暗示俊拔，曾被允诺提升艇长，可是却因故不可如愿。这时忽然传来敌情，泰勒临危受命，登上S-33老爷级潜艇履行奥秘任务，批示官为上尉迈克（比尔•帕克斯整理 Bill Paxton 饰），同业的还有哈…

Followed by Tony Towers, he's a local celebrity, a successful nightclub manager and he is engaged to a younger woman, Sue. Things get a little strange when he embarks upon the 3:17 to Nottingham for a Christmas family reunion.