Kim Dok-ja, a typical man in his twenties, is the sole reader of a little-known web novel called "Three Ways to Survive the Apocalypse." Upon finishing the final chapter, the story unexpectedly transforms into reality, bringing the all-powerful protagonist Yu Jung-hyeok into Kim’s life. Armed with exclusive knowledge of survival tactics, Kim teams up with his allies to navigate this new world and attempts to rewrite the ending to save humanity.