Veronica Reeves is an archeology PhD, a media darling for her discoveries on the slopes of Mount Fitz Roy, but now she finds herself trapped three miles below ground with Connell Kirkland and the others. Can she adjust to this desperate situation? Up on the surface, Sonny McGuiness is looking for survivors of the camp attack. One such survivor, Cho Takachi, has recently sent out a call for help — a call that is about to be answered.