THE CHILD IN THE VIDEO WAS TERRIFIED. WITHIN DAYS IT HAD GONE VIRAL. THEN THE INTERNET STOPPED WORKING - AND THEY REALIZED SOMETHING WAS SERIOUSLY WRONG. The sickness struck everyone over fourteen. First it twisted their minds. Next it ravaged their bodies. Now they roam the streets - crazed and hungry. Jack and Ed are survivors, determined to return home to London. Clinging to memories, they join misfits and fighters they meet on the road. And one adult, a butcher called Greg. But, when a devastating new threat rises, they know that for some there will only be one escape...