Doogie is no ordinary chimpanzee: gifted with an exceptional intelligence (perhaps the result of a scientific experiment), he has been taught a fairly sophisticated version of the human language, is capable of human emotions such as love and jealousy, and has a highly developed understanding of human behavior. After an accident to the spacecraft that was bringing him back to Earth from an orbital station, Doogie finds himself alone in the jungle. In order to survive, he must rediscover the very animal nature he has been trained to reject.