Survivor Greg Preston, who has just returned from mainland Europe and knows the virus has wiped out the population there, arrives home to find that his wife, Jeanie, has died from the plague. Greg is driving through the countryside when he meets Anne, who begs him to come and help the man she is staying with, Vic, who has been injured. Greg goes with her to the quarry where she has been staying and finds that Vic's legs have been crushed under a fallen tractor. Greg helps the best he can. Meanwhile, Abby arrives at a settlement run by a former Trade Union President, Arthur Wormley, and learns that he has some inside knowledge of the catastrophe from his contacts in the Government. He has set up a small community where he has appointed himself the man in charge of the entire area. At first interested at their intentions, Abby is later appalled when a man branded as a threat to Wormley's group is taken out and shot. Abby flees the house. Greg has driven to the nearest town to get ...