It's 29 December 1940, the night that Hitler has chosen to destroy London under a barrage of flaming incendiary bombs. Their main target - St Paul's cathedral - is where Francis Hancock is sheltering from the onslaught. But the First World War veteran doesn't just have bombs to contend with on this night. A young girl, who was also sheltering in the cathedral, mysteriously goes missing. Then some of those charged with protecting the building are brutally murdered. Francis must face both his own demons and fears in his struggle to catch those responsible and bring them to justice...