On the night the servers shut down, the data stream of the game Frontier Defense swallows professional gamer Su Chen, transmigrating him to a perilous primeval world where two moons hang in the sky. Towering trees blot out the heavens, monsters roam everywhere, and primitive tribes struggle to survive beneath the shadow of the blood moon's tides.
In this desperate world, Su Chen discovers a summoning ring branded on his left wrist, linked to four game accounts and sixty max-level characters. Firearms, armor, vehicles: they never wear out, and their ammunition is unlimited. But the power of the game's "Ark Fragments" also draws the terrifying attention of this world. An awakened Broodmother drives hordes of beasts before her, the Bloodclaw tribe, worshippers of destruction, plots a blood sacrifice, and other "fragment" holders scattered across the land are all dangerous figures bent on reshaping the world.
The countdown has begun. Within one month, Su Chen must use guns and steel to build an iron defense atop the ruins of the Shadowfang tribe, unite with allies, and uncover the mystery of the fragments. He faces more than the fangs of a primeval world: this is an ultimate war for survival that crosses the barriers between worlds and will decide the fate of two timelines.
Either hold on to everything, or lose it all.
