In his past life, the male lead was killed due to his misplaced mercy, betrayed by the sworn brother and lover he trusted, while Tuan Tuan, the dimensional mythical beast, also perished alongside him. Pushing her strength to the absolute limit, Tuan Tuan sent the dying male lead back 30 days before the outbreak of the doomsday. Armed with the agonizing memories of death, in this lifetime he no longer softens his heart, starting a frenzy of stockpiling goods and reinforcing his safe house to make foolproof preparations for the apocalypse. The reborn male lead only remembers that a mysterious entity saved him, yet he does not know that it was Tuan Tuan. This story is an AI fictional adaptation.