In the past the United States of Saherta sent its elite forces into an expedition to the Dark Continent, they went through the north of Lake Mobius and ended up in a sea of trees, after entering that for 400km they found the ruins of an ancient city with a mysterious labyrinth. It was there they found some herbs able to cure 10,000 different illnesses that they met Brion, the guardian of the ruins, that decimated them effortlessly leaving only two survivors.