Oops, Junior Sister's Secret Has Been Discovered

Ling Zhou, the chief disciple of the Qingyin Sect, discovers that his junior sister Qing Yun has a secret of treacherous magic. He wants to expose it but is drawn into the abyss instead. In the desperate situation of the netherworld, she refined the demon king, and in the barren mountains, she captured the soul-eating jade soul. The seemingly docile junior sister turned out to be a hidden demon cultivator. When Jiu Yao's spiritual veins were forced to become the container for her cultivation, the friendship between fellow disciples and the opposition between Tao and demons were distorted and deteriorated in life-and-death confrontations. This game that begins with a threat will eventually lead the two people into an irreversible entanglement of fate - will they fall into the same fate together, or will they reach the same destination by different paths?