A massive shark, which is supposed to be extinct for thousands of years, terrorizes the shores of the seaside town of Harradon. At first, no one believes the old lobsterman who first spotted it. But as time goes on, the evidence of a massive killer fish becomes a reality, and the locals try everything in their power to destroy it. Eventually, a young fisherman, a scientist, and an old sailor embark on a quest to catch the huge shark alive. But when they finally spot it, the question jumps from whether they can catch it to whether or not they will return to shore alive.