Soo-hyun Bae, a renowned author, finds himself reincarnated as Seo-jun Lee, a minor character in his own apocalyptic novel, after being fatally shot. Given a second chance by a divine being, he must navigate a world heading towards disaster, knowing the apocalypse will strike in 17 years.  Using his knowledge of the story, Seo-jun befriends Yong-ho Kan, a key character, and begins preparing for survival. As he gathers crucial resources and forms alliances, Seo-jun is determined to alter the fate of the world and his own character's destiny, seeking a better ending.