Priscilla Carpenter is a young Australian vet student working at the Melbourne Aquarium. One day, a diver is attacked by one of the sharks. Will he survive? Why did that shark behave so strangely? And what should they do about it? Priscilla and her compatriots become involuntary heroines in a quest for the truth that forces them to utilise all their skills, bravery and scientific knowledge to win the ultimate race against time. This is the first book in the series about Priscilla Carpenter.