故事发生在首部电影的数年之后,一群年轻的探险家们深入秘境,想找出这个在地图上被抹去的地点、其隐藏在通电围栏背后的秘密。当他们深入湖中心,他们发现了一个有著废弃工厂的小岛,而这裡正有著恐怖的遗产:这个岛属于一群致命掠夺者,它们迫不及待地想要大快朵颐任何来客。Legacy finds the team of young explorers out to reveal the secrets of an area removed from modern day maps and hidden behind electric fences. However, once they reach the center of the lake, they discover an island that harbors an abandoned facility with a horrific legacy: the island is home to a deadly predator eager to feast on those dumb enough to ignore the warnings. But before they can turn back, our hapless heroes get dragged into a battle for their lives -- and will need to work together if they hope to survive.