The journey begins . . . Plunged into darkness, the Earth's surface is shrouded in dust from the impact of asteroid AG5. Whilst the cloud threatens to choke the very fabric of civilization, Sarah Morgan is being held prisoner. In the depths of a subterranean facility, she has uncovered a deadly weapon; the truth behind the enormous structure buried beneath the Earth. Elsewhere, Professor Steiner and Robert Goodwin may be humanity's greatest hope, but they must struggle against monumental adversity as an internal battle rages within the Global Meteor Response Council. Running out of luck, choices and time, all must fight to reclaim their chosen paths or watch those around them wither and die.