Missing cattle are blamed on rustlers. It's happened before. The disappearance of a woman and her dog is believed to be a tragic accident. The tidal sands are often treacherous.

Both theories are wrong, and soon the body count rises. But with nothing to go on the local police are baffled.

An ex-MI5 agent, and a local journalist form an unlikely alliance to find out what's terrorizing this peaceful stretch of coastline. What they discover is a murdered scientist, and an experiment in genetic engineering that has gone horribly wrong.

Now there's something fast, powerful, and deadly in the water, and it's heading towards one of the country's largest nuclear power plants. Suddenly the ferocious feeding frenzy is the least of their problems.