Abby Grant's search for her son has taken her all across Britain and back. Following every possible lead, she finds herself on long-abandoned roads to forgotten villages.
On a routine trading mission from Whitecross to Evelyn Piper's Foundation, Jenny Richards and community doctor Ruth Anderson are ambushed by desperate scavengers.
Greg Preston has forged links with survivors in Norway to start rebuilding society. He's ready to return home to his family - until an unexpected visitor drags him into a race across the Scandinavian snows.