12-year-old Alexander Buchan was once content, training as a falconer at Strathbogie Castle in Huntly. But when his Earl sends him to Edinburgh to the court of the newly arrived Mary, Queen of Scots, the boy finds himself lured into a world of intrigue, terror and treachery. Alexander knows right from wrong, but how can he hope to outwit the Earl's murderous messenger? Surely no one can defy such a powerful master whose wife is rumoured to be a witch! Soon, more than the boy's own life is at stake: his friend Lizzie is arrested and the angry clouds of Reformation Scotland gather around the young Queen. It seems that Alexander must spy - or die.