This work contains AI-assisted generated content. The story takes place on the blood sacrifice platform in a fictional ancient xianxia world. A sword-cultivating youth risks his life to save the eldest princess who was treated as a sacrifice, binding them to a predestined killing-each-other ending. To break free from destiny, they embark on a journey to explore the mystery of the Heavenly Gate and fate, confronting the emperor who insists on opening the gate. After enduring life and death, they rewrite fate with human effort, writing a new covenant belonging to the living.