Billions died during the global civil war that followed the outbreak. Anarchy took grip. Chaos ruled. The world collapsed. In Britain, the evacuation failed. Nowhere was safe from the undead.
Four months after the outbreak Bill Wright has found safety in a ruined abbey in southern England, but he is still alone. All he has for company are the files sent to him by his shadowy contact, Sholto. On those, he believes he has found the origins of the undead, and the vast conspiracy in which he discovers he played an unwitting part.
He needs answers, and knows the only place they will be found is at the facility that created the virus. As he journeys through the desolate ruins of a dead civilisation, he meets other survivors. He rescues some, is rescued by others, but ultimately discovers that zombies are not the most deadly threat in an undead wasteland.