Leon, the Immortal, descends to Cloud City to find his reincarnated junior sister, Aria Sullivan. His attendant, Donovan Sullivan, discovers Aria is his great-great-granddaughter and arranges for Theon Sullivan to welcome Leon. Leon rekindles his past connection with Aria. Demonic forces arrive; Aria meets disaster trying to save Leon. Leon exhausts his spiritual power to rescue her. Aria endures hardships and finally spends her life with her beloved.