Apost-apocalyptic wasteland shrouded in crimson haze. I, who possess F-level Reset ability, accidentally unlock a powerful system. I rescue trapped companions and form a survival team, traveling through ruins and perils. The group fights zombies, mutated beasts and malicious forces, heading for Iron Fortress to search for clues about missing loved ones. They also confront an ambitious alliance. I stand side by side with struggling survivors, fighting hard for a safe homeland.