On the Sword Qi Continent, where people cultivate swordsmanship through lotuses, there is a legend that one day, the Heavenly Heart Lotus will be able to cross the river of time. Whoever obtains it will become immortal and indestructible.
The peerless Sword Immortal Dongfang Yuqing cultivated the Heavenly Heart Lotus, but was surrounded and killed by the great sects. Yet the lotus's cycle of reincarnation quietly began, and the secret of the Heavenly Heart Lotus was revealed. On the path of revenge, its bearer kills decisively and will stop at nothing to achieve their goal. Fate turns in silence, bringing them together with Li Xiangru, the Nine Heavens Sword Venerable, who also bears the Heavenly Heart Lotus. Along the path of cultivation, they meet a young man who seeks unity for all under heaven, yet chooses an unorthodox path of the sword.
Mother: "Zinian, your mother is leaving. Even if you refuse to acknowledge me as your mother, you are still my own flesh and blood. Let this Marrow-Washing Lotus help you achieve the supreme way of the sword. This is the only thing I can do for you."
The Heart Lotus flowed into the sea of his heart, cleansing his bones and marrow. The Marrow-Washing Lotus, which could normally improve one's aptitude by only one grade, now raised Zinian's blue-grade aptitude by three grades, to red.
Later generations would sing:
The Heavenly Heart returns through nine lives,
A mother's life buys her child another chance.
At first, he knew not the love of this world,
Fate toyed with him, though he stood equal to Heaven.
The supreme way of the sword questions the Nine Heavens,
Until the tale of nine reincarnations is complete.
He laughs proudly at the sky and claims the throne,
As all under Heaven unite and fate returns.