Dr. Emma Wilkie Collins and her squad are spend their 3rd summertime on the island of Little Happy analyze the consequence of clime alteration on the great white shark who come up to the nearby baby's room every twelvemonth to give birth. Along with the last two inhabitant of this former sportfishing small town, their peaceable life is interrupt when a “scientific” squad led by her ex-boyfriend and marine life scientist Richard demo up look for three bull shark who we shortly larn aren’ t merely any bull shark.