内容简介：
It is 1268. Oxford is forced to host the Tartars, Eastern people whose legendary fierceness has already wreaked havoc in France and Germany. This time they claim a peaceful mission - they merely wish to gain an audience with the King. But only the Tartar ambassador himself falls victim to evil. When he is found dead, it looks like murder, but how was it possible except by magic? Even when he thinks he's solved the case, Falconer still has to trick the murderer into giving himself away.