Xian no kyoukai ni okeru shugyou sekai de, Xian no chii wo toukatsu suru koto ga saikou no aimoku de, fukatsu no shirushi to naru. Sore dake de wa naku, sono aimoku no shita ni wa, Mo Dao to iu kinjirareta jutsu ga kakusarete iru. Kono michi wa yami to akuma no chikara to hitotsu ni naru. Ippun no shiawase ga tsuzuita ato, shugyouka no Wei Wuxian wa Mo Dao wo shiyou shi, kyoudai na chikara wo te ni iru kedo, daihakai wo okoshita. Saigo ni, kare wa hoka no shugyou kizoku ni korosare, shinjita nakama ga sono ochi ni kanwa suru.
Shi no juu-nen-go, Wei Wuxian wa kyousha no karada ni umarekawari, mukashi no dounin de aru Lan Wangji to saikai suru. Kono deai wa, shugyou kizoku no kiban wo furuwasaseru fukuzatsu na chousen no nazo wo haitatsu suru.
"Mo Dao Zu Shi" wa, Wei Wuxian to Lan Wangji no tabi wo tsuru. Seirei no sekai no himitsu wo saguru koto ni tachimukau. Akuma, rei, teki na shugyouka to no tatakai no naka de, futari wa omowazu na nakama to natte iku.