Lou Xuejin was born with a sword bone and made a name for himself at a young age.
When he was six, his family was wiped out and he fell into the Demon Realm. After enduring countless hardships, he entered the Dao through the sword, cleaved open the Demon Abyss alone, and returned to the human world.
From then on, Lou Xuejin made it his mission to exterminate demons and defend the Dao. With ten years of swordsmanship behind every strike, he became, beyond dispute, the greatest swordsman in the Nine Provinces.
And yet, in the nineteenth year of the Shenxuan era, Lou Xuejin murdered his master and became a demon. He then left his sect and entered the Demon Realm, never looking back.
Once, he was the enemy all demons hated and longed to tear limb from limb.
Later, he became the great demon whom every righteous immortal feared even to mention.
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When Yan Sui joined the Sword Sect, Lou Xuejin accepted him as a disciple on behalf of their master.
His senior brother taught him to read and write, to hone his sword, to uphold the righteous path, and to cherish the green grass and understand the world.
Yan Sui remembered the day his senior brother went into seclusion. The sky was bright and clear.
His senior brother patted his head and said, "When I come out of seclusion, we'll travel the Nine Provinces together."
He waited and waited, through spring and autumn, until the Sword Pavilion collapsed. What came at last was the sect's order to hunt down his senior brother.
Everyone said Lou Xuejin had murdered his master and stolen a treasure, repaying kindness with betrayal. He had become a demon long ago.
Yan Sui didn't believe them.
He chased after him for thousands upon thousands of miles, all the way to the frontier of the Demon Realm.
A sword flashed coldly and pierced his heart.
Through the haze of blood, he saw the merciless coldness in those once-gentle eyes.
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Everyone knew that Venerable Yan of the Sword Sect held a deep grudge against the Demon Venerable: the murder of his master, and the sword that pierced his heart.
Venerable Yan would cross tens of thousands of miles of treacherous terrain to slay the demon with his sword.
Later, Yan Sui did indeed take up his sword, only to be defeated alone outside the Demon City.
That day, red rain fell over the Demon Realm. The man he hadn't seen in years looked at him and said, "My sword can't kill me. Go back."
At last, Yan Sui raised his bloodstained hands and seized the hem of the robe he had missed by half an inch so long ago.
He wanted to ask, Senior Brother, Senior Brother, why did you leave me behind?
Younger gong.
Theme: No matter how difficult things get, never give up hope.