In the thirtieth year of the end of the world, nuclear sewage is flooding, vegetation is mutating, and oxygen is depleted, bringing the world into a desperate situation. The five immortals from the northeast, Hu, Huang, White and Willow Gray, exhausted their cultivation and resisted the punishment of heaven. They divined the only chance of survival in the Qin Dynasty and used time and space instruments to travel back and trace the origin. The thousand-year-old Willow Immortal has become acquainted with Su Su and overturned the strife in troubled times. The cunning Yellow Immortal wanders in Pei County and encounters Liu Bang. The immortals travel to various parts of the Qin Dynasty to disrupt the pattern of the pre-Qin Dynasty as demon immortals. They buck the trend in hilarious entanglements, vowing to cut off the root of the millennium's evil and reverse the fate of the destruction of the people in the last days!