Continuing his masquerade as the deranged lunatic from the Lanling Jin Clan, Wei Wuxian resides in the Cloud Recesses while his former cultivation classmate, Lan Wangji, searches for answers about the demonic severed arm they have in custody. With an overwhelming dark energy emanating from the arm, the two are forced to work together in order to keep it contained. However, the demonic arm is not the only dark force lurking in the region, and as spiritual tensions rise in the mountains of the Gusu Lan Clan, it is up to the two of them to try and restore the natural order.