Story background The novel is set in a fantasy world where martial arts and swordsmanship are revered, with constant power struggles and the strong being held in the highest regard. Main plot Family upheaval: Ye Xuan, originally the crown prince of the Ye family, was deposed due to a mysterious attack on his dantian. He was also forced by his family to abdicate to Ye Lang, and his sister Ye Ling was also implicated. Rise from Adversity: In the Jieyu Tower, Ye Xuan unexpectedly obtained the lost swordsmanship, repracticed the swordsmanship, gradually broke through the realms (such as the Earth Immortal Realm, Sword Dao Breakthrough Realm, etc.), and eventually became a Sword immortal. Guardian and Growth: He has been protecting his sister Qing 'er all the way, fighting against powerful enemies, experiencing life-and-death competitions, academy cultivation, and multi-dimensional universe adventures, and demonstrating extraordinary skills such as "One Sword Decides Life and Death" and "Drawing the Sword to Settle the Soul". Character building Ye Xuan: Resolute and courageous, he values loyalty and affection. Through his own efforts rather than relying on external means, he rose to fame and was hailed as a "flesh-and-blood hero". Other characters: The younger sister, Qing 'er, is invincible. Her relatives, friends and enemies interweave into a complex network of relationships, driving the plot forward Core theme The work conveys themes of courage, self-transcendence and the brilliance of humanity through Ye Xuan's growth, while integrating elements such as magic, divine beasts and multi-dimensional universes to construct a grand worldview