In an ancient apocalypse where humans and ghosts coexist and civilization is in decline, Su Qinghe, a peasant girl struggling to survive, accidentally activates the "Doomsday Survival System." The system allows her to earn points and rewards by issuing tasks such as purifying demons and ghosts, collecting supplies, and building homes. It also gives her the ability to make contracts and control ghosts. She grew up step by step from a girl who trembled under the threat of ghosts, built her own wasteland into an impregnable "spirit house", and developed the contracted ghosts from coolies into an army of hundreds of ghosts. During this period, she met Gu Changye, the last leader of the Night Watch who was aloof and powerful and was tasked with protecting humanity. From the initial trial and suspicion, to several life-and-death encounters between the two, Gu Changye was moved by Su Qinghe's tenacity and warmth and transformed into a loyal dog-like boyfriend to protect her all the way. In the end, Su Qinghe led her army of hundreds of ghosts and fought side by side with Gu Changye to uncover the truth about the coming doomsday, eliminate the ultimate evil god that brought trouble to the world, and bring new life and dawn to this broken world.
