Zhu Ning, who once led the fight against zombies during the end of the world, has unexpectedly traveled through time and space, and this time she finds herself in a wasteland world.

Eighty percent of the world's land is contaminated. Humans are classified into five classes, and she becomes the lowest-ranked fifth-class citizen, that is, an unlucky defective.

With no money in her pocket, Zhu Ning has no choice but to work as a cleaner, sweeping up garbage. She has heard that sweeping garbage in this wasteland world offers good pay and requires little effort, making it an ideal job.

However... why is this garbage-sweeping job completely different from what she had imagined?

When she steps into the mysteriously vanished Subway Line 1, she encounters a fish-man carrying a briefcase and with a fish head.

Entering a popular hotpot restaurant, she discovers that this hotpot restaurant actually eats people!

When she enters a haunted house, the furniture moves on its own in the middle of the night and chases after the owner.

Even in the aquarium, which should theoretically be a warm and healing place, she can come across mermaids forced to reproduce, blood-sucking mechanical jellyfish, and unknown transparent creatures.

When she walks into a dentist's office and stretches out her hand, teeth rain down from the sky.

Not only that, it seems that the cleaning company is hiding some huge secrets.

Artificial intelligence is suspected to be pulling the strings behind all this.

That pharmaceutical company looks extremely ruthless!

Zhu Ning is inexplicably caught up in this dispute, and one false move could easily lead to her death.

In this wasteland world, everyone has a multitude of schemes and ulterior motives.

Zhu Ning can't help but sigh, "Is God playing a joke on me?"