In My World: The Final Realm, Wang Haoyu, a young and ordinary chef, wakes up in a post-apocalyptic world where a deadly T-virus outbreak has decimated humanity and mutated animals into terrifying beasts. Stranded in a mysterious, crumbling house, he discovers a unique system that allows him to upgrade his environment and trade for supplies using energy points harvested from slain creatures. As he struggles to survive, Wang Haoyu forms an unlikely alliance with Lin Wanting, a fierce and capable survivor born in this harsh world. Together, they must navigate the dangers of this new reality, battling mutated monsters, scavenging for food, and uncovering the secrets of the system that might hold the key to their survival—and possibly, a way back home.