A terrible virus has wiped out most of the human population and Scotland is now a wasteland. Toby and his family are being held hostage on the island of Orkney by a terrifying militia group called the Corporation. Toby knows he and his friend Tash must escape and find their way to Edinburgh if they are ever to bring about an end to the carnage that the red fever has caused. Arriving in Edinburgh, things are even worse than they feared: the city is deserted, and overrun with wild animals. All they have is a name -- but can they find the one person who could help them save not only their friends and family, but the whole world?