A killer stalks his prey within the walls of a Sydney zoo ... Nikiya Adams, a producer on David Attenborough's tV series Life On Earth, travels from England to Sydney to research the endangered species breeding programs of the Royal Prince Albert Zoo. the zoo's director is Dr James Rivers, who Nikiya fell in love with ten years ago and has never forgotten.Arriving at the Royal Prince Albert, she is plunged into a web of intrigue and mounting fear as Dr Rivers' plans for modernising the zoo come under attack. When Nikiya and Rivers become trapped in the zoo at night, they find themselves in a hunting ground, and Darwin's 'survival of the fittest' takes on a terrible meaning ... Against the fascinating background of the operations of a major zoo, Alan Mills crafts an enthralling story of conspiracy, terror and the struggle to protect endangered species.