The Unhallowed Child
In a world of mystical creatures, a young demon girl is brutally killed alongside her brother Zhang Li. Desperate to save her, Zhang Li obtains the body of a fox immortal and uses it as a vessel to revive his sister.
However, the immortal body rejects the demon's essence, forcing Zhang Li to sustain her life by extracting human energy threads. His methods attract the attention of Su Ning, whose sister falls victim to Zhang Li's exploits.
Seeking vengeance, Su Ning's kingdom dispatches him as a spy to eliminate Zhang Li. Under the guise of friendship, Su Ning navigates Zhang Li's inner circle, unaware of the darkness driving him to keep his sister alive.