A beautiful scientist on the verge of making medical history. But for the greater good, her experiments have violated ethical codes in the hopes of using genetically modified sharks to regenerate human brain tissue. Now, one of nature’s fastest and most perfect killing machines has been re-engineered as something smarter, faster and much, much more deadly. And when things go disastrously wrong as a tropical storm bears down, the aquatic killing machines begin hunting their creators . . . who are alone and adrift on the Deep Blue Sea.