A mixture of science fiction and horror set on an Earth that has been devastated by a deadly virus. Billions have perished. The survivors moved underground. Thirty years on and plagued with guilt following a devastating crash, pilot Loki is coaxed back from the edge by his partner Sash. Together they must take on a new mission: go Topside. Retrieve missing recon team. Hostility unknown. After a thunderous journey through the Earth's crust they discover the planet surface is not what it once was: only death survives. As they quickly uncover the fate that befell the first team, they are forced to make a choice: stay and die or stay and fight. But what will kill them first - the mutants or the virus?