If you enter the Tomb of the Forgotten Scholar in the Necropolis, you'll come across Mad Wen Zhi, a doctor who needs a fresh liver to save his daughter, who's dying of some sort of degenerative liver disease. He tells you to find the corpse of Ji Xin, freshly deceased, who was interred in one of the towers to the north of Wen Zhi's position, and bring the liver from his corpse back to him so that he can perform the operation.