Alan McCade has taken his family to the Amazon jungle for an animal research project. The family thought that it would be a great experience for everyone but things did not go as planned and the McCades found themselves lost and abandoned in the heart of the Amazonian wilderness. Among the dangers that they encounter is the threat of being hunted by a fierce, flesh-craving animal that is unknown to modern civilization but legendary to the locals, a creature that the tribespeople believe was sent by the devil himself. The beast they call the Actosite!