Master William Falconer returns in this chilling and atmospheric medieval murder mystery. Oxford, April 1272. The Lady Ann Segrim has been murdered, and a Regent Master has been taken at the scene of the crime, red-handed. The suspect is William Falconer, who now languishes in Bocardo - the town gaol. Strangely, Falconer neither denies the charges, nor does he present anything in his defence. Falconer's past relationship with Lady Segrim is the subject of rumour, but Thomas Symon, once Falconer's pupil and now Master in his own right, is disturbed by Falconer's silence and suspects something is amiss. Using Falconer's own logical methods to solve the crime, Symon, along with Saphira Le Veske, Falconer's new lover, set out to clear his name. What they uncover is an extraordinary plot, one that will have devastating consequences, unless the true murderer of Ann Segrim can be revealed.