The grand opening of a luxury resort on a remote, unexplored island quickly turns into a catastrophe when mysterious tentacled creatures launch a sudden attack. As the guests and staff are overwhelmed, the celebration transforms into a nightmare of biological horror, leaving the survivors trapped in a struggle against an insatiable, erotic force.
As the tentacle monsters continue their onslaught, attempts to repel them with technology fail, leading to the brutal assimilation of Dr. Hanna. Meanwhile, a supposed safe haven in an underground shelter becomes a site of betrayal and horror as the survivors are systematically corrupted. The tragedy peaks when a family is reunited only to find their parents transformed, eventually leading to the total corruption of the children as they are absorbed into the monsters' twisted new world.