本片根据艾德加·赖斯·巴勒斯的小说改编而成。讲述的是第一次世界大战期间,一艘德国潜艇在撞沉一艘英国人的船以后,救起了幸存者。但是这艘潜艇开错了方向,将这些幸存者带到了一片未知的土地上。那里,栖息着大量的恐龙和穴居人。他们能顺利地重返家园吗?A sequel to The Land That Time Forgot. Major Ben McBride organises a mission to the Antarctic wastes to search for his friend (Doug McClure) who has been missing in the region for several years. McBride's party find themselves in a world populated by primitive warriors and terrifying prehistoric creatures, all of whom they must evade in order to get back safely to their ship.