In 2018 the Whitsunday Islands in Australia are rocked by a series of shark bites. All the victims are attacked in the same small patch of ocean, no larger than four football fields. Is a rogue serial killer on the loose, or is something new drawing humans and sharks into conflict? With lives on the line, shark experts Adam Barnett and Richard Fitzpatrick face a race against the clock to find out who, or what, is responsible.