What you have found is almost too wild to believe. According to the murals and records within the city, the "Elder Things" were travelers from the stars. They colonized the Earth long before the time of humanity, settling far and wide. And deep in the undercity beneath the tallest mountain, they found a dormant, primordial power - something so terrifying, they built a gateway to seal it within. But eventually, it began to escape, and their civilization collapsed...
There must be even more preposterous secrets buried deep below. You have to learn the truth of this ancient power, and in order to do so, you must find the secret passageway that will lead you deeper into the heart of the mountain.