Two decades ago, a massive portal tore open above Earth, unveiling a verdant alien planet teeming with both vital resources and utterly bizarre life. Now, the Tiberius Coke Corporation pushes ever deeper into this new frontier, their expeditionary teams carving out outposts in an untamed world.

Thirty miles from their home base, Chief Yugi Oishi, leading Team Sierra's small band of security specialists, spots a desperate SOS flare erupting from a supposedly abandoned mine facility. She breaches the entrance with her four-man team, only for powerful creatures to immediately swarm them, sealing them inside. Deep within the treacherous tunnels, they find a stranded excavation crew, picked off one by one by a monstrous predator. Their only hope for escape from the planet lies in reaching a distant vehicle, but one wrong move could rouse the very beast that stalks The POOL's darkest corners. Can they make it out alive, or are they already trapped in its hunting grounds?