Zhu Ning, who was leading the charge against zombies during the apocalypse, has crossed over-this time into a wasteland world. In this world, eighty percent of the land is contaminated. Humans are divided into five classes, and she becomes a Fifth-Class Citizen-the lowest of the low, a defective product. With no resources and nothing to her name, Zhu Ning is compelled to become a cleaner, sweeping up trash. Rumor has it that being a garbage collector in the wasteland is a job with good pay and little work-a dream occupation. However... why does this job of sweeping trash seem so different from what she imagined? Entering the vanished Line One, she encounters a fish-headed man carrying a briefcase. Visiting a popular hotpot restaurant, she discovers that the restaurant eats people! Exploring an abandoned mansion, she finds that the furniture moves at night, chasing its owner. Even in what should be a soothing oceanarium, she meets a mermaid demanding reproduction, blood-sucking mechanical jellyfish, and mysterious transparent creatures. Going to a dental clinic, she reaches out, only for teeth to start raining down from the sky. ... Moreover, the cleaning company seems to be hiding some big secret. Artificial intelligence might be the mastermind behind everything. The pharmaceutical company looks suspiciously unscrupulous! Zhu Ning unwittingly gets entangled in disputes, where one wrong step could mean an early death. In the wasteland, everyone has eight hundred ulterior motives. Zhu Ning: Is fate playing tricks on me?