In a mutated world that has come to the end of the world, Lin Ci, who is burdened with huge debts, is accidentally involved in a global energy storm during a rainy night delivery, and gradually awakens to become the "post guard" who guards the interstellar station for generations. In order to repair the damaged core of the station and pass a civilization assessment to save humanity from reset, he formed a mutual aid alliance with survivors such as Su Luo, who has "gustatory synesthesia", to protect the old city and fight against the mysterious organization "Ascension Society" and its leader Lu Wenyuan who attempt to control supernatural powers and sacrifice guardians. In the apocalypse where ruins and hope are intertwined, he launched a life and death struggle related to the survival of civilization.
