Qin Aixi was an orphan raised by mountain spirits. Though she possessed healing spiritual powers, she couldn't save herself from the failing lifeline in her heart.
One day, a Demon Lord dressed in black came to the village. He gripped her chin and sneered, "I've searched for a hundred years. So it was you who hid half of my spiritual marrow."
She thought she was doomed, but he forcibly bound them with a "Crimson Fate Seal," declaring, "From now on, your life is in my hands."
Later, all six realms learned that the Demon Lord, who slaughtered his way across the world to restore his spiritual marrow, had gone mad.
All the rare treasures he tirelessly sought day and night were used to nurture the lifeline in the heart of an ordinary woman.