In the Ten Thousand Bones Cave, where poisons are made and raised, brothers fight for the poison book. After the heroine Mu Xiuyu's father died, several uncles brutally tortured Mu Xiuyu to test the poison in order to track down the whereabouts of the poison book. The heroine went through the edge of life and death and escaped from the secret realm of the Ten Thousand Bones Cave with the help of the blood toad. She entered Hedu by accident and was looking for the poison book. In the process of searching for the mystery of his life experience, he accidentally met "Yinzhu" (a pseudonym), the third son of the emperor who was poisoned and his meridians were completely destroyed. The pair spent a happy time together. However, as Mu Xiuyu's life experience was revealed and Yinzhu fell into a power struggle, the relationship between the two cracked. Following the death of Yinzhu, Mu Haoyu completely turned into a black man and escaped into the devil's way, launched a revenge, and finally became a terrifying demon lord of the Ten Thousand Bone Cave.
Intention: Independence, not bowing to fate, not admitting defeat