Kim Dokja is young man working in an office who has read the novel "Three Ways to Survive in a Ruined World" for a large majority of his life. When the novel finally ends at chapter 3149, the world of the novel suddenly becomes reality, and Dokja becomes the only person who knows how the world will end. He attempts to change the course of the story by solving and conquering challenges, known as scenarios, which are operated by dokkaebi.