What If Homosapiens and Homoerectus Both Survived?

In an alternate world where two human species evolved side by side, the Earth is divided into three continents: Homogenia, the land of technology and innovation; Erectland, the land of strength and survival; and the mysterious No-Man's Land, where the world's most valuable resources lie hidden. For years, tensions between Homogenia and Erectland grow over control of these resources, eventually leading to the First War of Civilization. Although peace is restored through the Treaty of Sharing, an unknown threat watches from the shadows of No-Man's Land. When strange attacks begin and investigations vanish without a trace, both civilizations discover that they are not alone. Hidden beyond the known world lies a secret civilization far older and more advanced than either of them. As mysteries deepen and ancient secrets emerge, a young scientist named Roy uncovers clues that could change the fate of the world forever. But with war looming and a powerful enemy preparing to strike, time is running out. Can Homo sapiens and Homo erectus overcome their differences and unite against the unknown, or will their divided world fall to a threat beyond imagination? A tale of evolution, conflict, mystery, and survival, where the fate of three continents hangs in the balance.