Kim Dokja is an ordinary office worker whose only joy in life is reading his favorite web novel, Three Ways to Survive in a Ruined World. For over a decade, he has been the story's only loyal reader, right up until its conclusion. However, immediately upon reading the final chapter, the fictional world of the novel shockingly becomes reality. "Scenarios" appear, forcing humanity to participate in deadly, game-like trials, transforming Seoul into an apocalyptic battleground ruled by powerful Constellations and ancient Dokkaebis. As the only person who knows the complete trajectory of the ruined world—the characters, the secrets, the plot twists, and the optimal survival strategies—Dokja must now use his omniscient knowledge to survive the brutal trials and change the tragic fate that awaits the novel's original protagonist, Yoo Joonghyuk, and all of humanity.