The Long Dig is set within the darkest Mist, a technology-destroying post-apocalyptic remnant of an old war that has shattered civilization as we know it. Eve scours decaying old ruins for Antenoch technology that was buried or otherwise preserved. Having - she hopes - perfected a mixture of oils that will prevent the decay of Antenoch artifacts, Eve is equipped to safely remove them from these ruins. Today, she's found an old transportation hub, perhaps a subway, haunted by monsters and hiding treasure.