Xuan Yao, the strongest prisoner in the Three Realms, has seven soul-locking nails nailed to "Nothing" - a taboo that can swallow existence. For three thousand years, he suffered alone and went crazy alone, until Ayu fell into his ruins.
She has a life-deficient body and cannot live to be thirty, but she can touch the "nothing" that even gods fear. He insisted on keeping her as an "experimental subject", but in fact she was the only white noise that allowed him to sleep peacefully after thousands of years of insomnia; she laughed and called him "an otaku who has been imprisoned for three thousand years", but she asked him "does it hurt" for the first time after he let go of the nail and killed someone?
The "same heart curse" is planted, which is both a bond and a curse - he knows that she loves him, and when he loosens his grip, she feels hot.
When Jiuying smells the fluctuation of "nothing", when Simingdian discovers his love, when the truth about the "Fallen Angel" three thousand years ago comes to light... Xuan Yao's seven soul-locking nails loosen one by one, from half a nail to instantly kill Tianjun, to seven nails loosened to destroy the three realms, but they begin to devour the people they least want to hurt.
And she used her missing lifeline to weave a silver scarf to calm him; in the name of "roommate", she forced him to learn to say "I'm waiting for you"; as a mortal, in the dark mist where he was out of control, she held his hand and said, "Give me some pain, and we will be even."
The essence of "nothing" is the possibility of non-existence, and she is the only "something" he wants to exist.
From Guixu Prison to the Double Realm Anchor, from "Prison Suppression for Three Thousand Years" to the symbiosis of "neither god, nor human, nor demon" - this is a two-way journey to change fate against the will of heaven: he learns the use of "weakness" for her, and she weaves a new way of heaven for him.