Evil stalks the city of Edinburgh. This time, the threat is bigger than the crooks, scam-artists, and drug dealers who find their prey in the shadows of the city’s streets. The body of a respectable businessman is found hanging from a tree, a veteran from a Belgian marching band is killed in a hit-and-run incident, and another person dies of an apparent heart attack. Excitement on the streets of Edinburgh is feverish as the city prepares for a massive rally to celebrate the return of Pope John the 25th to his home town. With the whole world watching, the security has to be bulletproof. But is there a chink in the armor, and does DCC Bob Skinner have the inner strength to find the answer to the biggest question of all?