Rhys Morgan has been ordered to accompany a mining executive down tunnel twelve, a mining shaft that hasn't been used in years. Though Rhys has been underground thousands of times in his life, he is worried by this trip. For the past few days he, and the other miners, have noticed something strange about the previously boarded entrance to tunnel twelve. There's a chill in the air that seems to be coming from twelve, and the air is coming the wrong way up the tunnel.. When the tunnel collapses behind both men, Morgan is left alone with something new. Something dark and alien, and violent..