Lu Zhaolin was once the gentlest swordsman in the world, but overnight he became a demon with a vicious heart and bloodbathed the three realms. No one knew that what was sealed in his body was the soul of his biological brother that his sister Wei Shuhuai had buried with her own hands. Now, the mad demon has revived, but she is the only one holding a sword and going retrograde, using blood as a guide, hoping to use her soul to reshape the seal. She didn't want to kill him, she wanted to save the young man who had blocked the knife for her and smiled like the melting snow in spring - but he no longer remembered who she was.
