One of the planet's three suns is threatening all life as we know it. You are one of the few people who knows about it. On the way to the institute where you're supposed to try and save the world, disaster strikes already: Earthquakes destroy much of the subway system, killing all your fellow passengers. But these quakes also carve the way into a long-forgotten underworld full of machines and artifacts dating back to the early days of colonisation -- and even before that.