During Lizong's reign in the Southern Song Dynasty, the Kingdom of Jin fell, powerful neighbors in the north suppressed the territory, and the rivers and mountains of the Central Plains were shattered. Lin'an Prefecture official Shen Wenyuan died heroically on the bank of the Qiantang River on a snowy night because he was guarding the magical book "Essential Techniques for Destroying the Enemy" on the art of war left by Commander Yue. The orphan Shen Lie wandered the desert with his loyal servant, and practiced hard for ten years in the wind, frost, cold and heat, and learned the astonishing "Dragon's Breath Sutra" and the calm and powerful "Flow-breaking Epee".
After Duanping entered Luo, the world was shaken. Sixteen-year-old Shen Lie returned to the Central Plains with the important task of guarding his secret knowledge. He saved lives in the ruins of his old capital, and met Su Wanqing, a descendant of a medical family, during a flood and plague. A heavy sword can sweep away the demons in troubled times; a body of righteousness can resolve the grievances of a hundred generations. From the lonely smoke in the desert to the misty rain in the south of the Yangtze River, from the depths of the temple to the far distances of the rivers and lakes, Shen Lie was tempered by blood and fire, and finally realized the true meaning of chivalry: protecting the country and the people is the most courageous.
When a powerful enemy pressed on the border and half of the country hung on a thread, Shen Lie resolutely led his troops to defend the isolated city, supporting the backbone of the nation with iron bones. The hatred of family and country, the courage of the sword and the heart of the piano, weave a magnificent heroic epic.