When Ollie and Scarlett McKenzie are offered the chance to travel to the mighty Amazon jungle to investigate the mystery of disappearing Indian natives they jump at the chance...but can the fabled man-eating monster, the Mapinguari really be at the heart of the disappearances and does Montezuma's legendary lost city of Para Kiti really exist? With their father Gordon, they enlist the help of an eccentric Chinese cryptozoologist and an Amazon Indian native and embark on what appears to be a routine mission - but it's a mission that rapidly spirals into danger as the team face the ruthless drug baron Don Ortega, who will go to any lengths to protect his illegal gold mine. Lost and wounded in the jungle, Ollie and Scarlett must learn to work together and trust the skills of a Native called Nyeti if they have any chance of getting out of the Amazon alive.