Led by Gordon McKenzie and his colourful crew, the huge ocean-going research vessel, Aurora serves as the headquarters for the Gaia Protection Trust, travelling the world to investigate and save endangered species, people and habitats.A cryptic email sent to McKenzie lures the head of the Gaia Protection Trust and his teen children, Ollie and Scarlett to Brazil. Things soon go wrong. Lost deep within the mighty Amazon jungle, Ollie and Scarlett are plunged into a fight for survival as they try to unravel the mystery of disappearing native Indians and a legendary monster, the 'beast that roars', a creature long thought to be extinct. Pursued by the ruthless drug lord Don Ortega, their every step is dogged by treachery, betrayal and danger. The twins must use all their wits to stay alive as they try to unravel the amazing secret of the lost city of Para Kiti and find a way out of the sinister corridors of the Amazon jungle. All they have to do is survive...or die.