A deadly virus spreads across the world as quickly as the passenger jets that encircle it. Within weeks, most of the global population is dead. The human race is thrown back into the dark ages. The few left alive must rely on the most basic skills to survive one day to the next. Abby Grant ventures out into a strange new England, her husband dead, the fate of her son unknown. Jenny Richards flees London. Engineer Greg Preston arrives from abroad. Desperate lone travellers come together, their instinct to form a community, even if that means rebuilding civilisation from scratch. But not all who are left have such high ideals? And while she has the chance of a new beginning, Abby cannot settle until she knows the truth. Has her son survived? Written by Terry Nation and directed by Neil Gardner.