Jonas Taylor, a rescue diver, attempts to save a group of scientists in a damaged nuclear submarine. As Taylor is rescuing the last survivor, he sees the hull of the submarine being rammed in by a giant creature. When he returns to the rescue vessel, two of his crew are trapped in the damaged submarine; Taylor leaves, realizing that attempting rescue would result in the death of everyone. Moments after leaving in the rescue submarine, the damaged sub is destroyed in an explosion. Taylor's account of the story stating that a giant sea creature was the cause of the disaster was dismissed by Dr. Heller, who believes that Taylor was affected by pressure-induced psychosis.