The fishing industry of a small Northwestern coastal town is nearly destroyed when a mysterious giant sea creature takes up residence. Based on a novel by Peter Benchley, the story bears more than passing resemblance to the author's most popular story, Jaws in that a few, including a scientist, learn the terrifying truth and try to convince a skeptical community that they are all in danger should they go too near the water. Once the town believes, it is up to the hero, a lady coast guard officer, and the scientists to stop the beast. This feature originally aired as a two-part miniseries on network television.