July 1939, and 3,500 young men from around the world arrive at Monzie Castle, outside Crieff, for the third International Rover Scout Moot.

Among them is a murderer.

Bob Kelty finds the badly-burned body of a man in a tent outside the Moot Campsite. But the authorities seem strangely reluctant to investigate, and once more it is down to Bob Kelty to uncover the truth.