Guo Jing returns to Mongolia after his trip to the Song Empire and joins Genghis Khan in the Mongol campaign against the Khwarezmid Empire. He plays a significant role in the capture of the city of Samarkand and returns home in triumph. When he discovers later that the Mongols are planning to invade the Song Empire, he renounces his loyalty to the Khan and flees from Mongolia. Thereafter, he establishes a base of operations in the city of Xiangyang. Since then, Guo Jing has dedicated his life to defending his homeland from foreign invaders.