At the end of the Song Dynasty, the Yuan army marched southward, and the country was in turmoil. • In the Central Plains, the complex situation of rivers and lakes intertwined with the imperial court. Lin Xiaotian, a young swordsman from the Tianjian Sect, whose life experience is a mystery, has an upright character and strong martial arts skills. Cheng Ling'er, the heroine of Bibo Tower, has a distinguished background and has a complicated emotional entanglement with Lin Xiaotian. The Mongolian Khan Meng Ge formulated a strategy to destroy Dali and then attack the Song Dynasty. He sent the Yuan army commander Kublai Khan to attack Dali. After Dali was destroyed, Meng Ge led his troops to conquer the city in person. The troops arrived at the Diaoyu City, and martial arts heroes from all walks of life rushed to the aid of Diaoyu City. In a battle, Meng Ge was seriously injured and died that night. The Mongolian army retreated to the north, which made the Song Dynasty stable for several years.
