Having set up an underwater laboratory on the outer banks of Angel's Island, the group of scientists go about their daily activities, unaware that the glass walls of their habitat allow those hungry creatures outside, to peer inward. One of those predators, a primeval horror, with eyes the size of dinner plates, is determined to feast upon the succulent prey. It soon becomes the ultimate test of survival between man and beast, both of which are intelligent and resourceful. It falls upon one man, to engineer a rescue for those trapped below, save the project, and restore the natural balance to...