A castle can be made safe from the undead, but not from the people inside the walls. It is seven months since the outbreak. In the anarchy and chaos that came with the undead, civilisation was destroyed. In the wars that followed, the planet was nearly ruined. Billions died. Only a few thousand survived. Fifty people have found refuge in the Tower of London. Zombies plague the city outside the old fortress. The wasteland beyond is filled...