The Abyss has arrived, and civilization is destroyed. Lei Mingkai, the last survivor, carries the last core of his homeworld's civilization—the Longya Lion Zero—and travels through numerous mech-war times and spaces, searching for a way to revive his homeworld and launch a war of revenge against the Abyss. In the face of the Abyss that has destroyed countless civilizations, the lonely survivor lets out a roar from the depths of his heart: "Planets can be destroyed! The universe can be destroyed! But civilization will never be destroyed! Even if the world has reached the end of destruction, civilization will be passed down for thousands of generations!"