The moment Song Yu transmigrates, she finds the original body's older sister, A Ying, dead by the stream.
The Dongmai blood in both sisters can suppress the ancient demon dragon inside the original novel's male lead, Zong Hezhou.
A Ying's identity is discovered, and she dies horribly at Zong Hezhou's hands.
A love letter left behind by the original body reads: "Lately, Elder Sister seems like a different person. She even threatened to kill herself to make me go down the mountain and find someone."
Staying on Green Mountain would mean waiting helplessly for death. Too many questions remain unanswered.
Despite the interference of Zong Yuqi, the original novel's male lead's older brother, Song Yu sneaks down the mountain and steps into the tumultuous world beyond.
She studies under a master and trains in both the blade and the sword. Along the way, she has a chance encounter with the demon emperor, Qi Xuanyou.
Later, her Dongmai blood awakens, and she joins a group of talented youths bound for the capital to take the Abyssal Trial.
Unbeknownst to them, they have long since fallen into a vast conspiracy, becoming pawns of the person pulling the strings.
In the midst of war, their bloodlines resonate, and sealed memories gradually surface.
It turns out that A Ying, the woman involved in the bloody case at the beginning, was far more than she seemed.
Theme: Fate is not set in stone. We must break free from our predetermined destiny, protect those we wish to protect amid a chaotic age, and take care of ourselves as well.
