The Lost Legion is about the first encounter between two of the most powerful forces in the history of civilization, the Roman Empire and the Han Dynasty of ancient China. In 53 BC, a Roman legion was defeated in the Middle East and the surviving Roman soldiers were sold into slavery in the far east, North of China in what is now known as Mongolia. An intrepid band of Chinese warriors freed the legionnaires from captivity, and teamed up to defend China from the fiercest army in history.