Years after a mysterious plague wipes out humanity, Halley Clarke leaves the safety of her home in Cornwall, England, to search for other survivors. She follows the coast, searching ghost towns and empty villages, finding nothing but dust and decay. Then, by sheer luck, she happens upon Nate Reynolds- a young man devastated by loneliness and despair.
Instantly, they form an inexplicable connection and it soon becomes clear that this is no ordinary virus.
Halley is convinced there are more survivors out there. If so, are they experiencing the same odd phenomena that she is -dreaming of a dark world and a red desert under an ash-filled sky. What could it possibly mean?
Driven by the need for answers, the couple head to London. There, in the dark and silent city, they discover more than they could ever have imagined. Otherworldy forces are at play, and whoever -
or whatever-
is responsible for the virus, has big plans for Halley and Nate.