Cambridge, March 1354, and the cause of murder is once more on the minds of physician Matthew Bartholomew and his colleague Brother Michael.
It is a time of division and denomination at the great University. The Carmelites and the Dominicans are at theological loggerheads, so much so that the more fanatical members are willing to swap rational judgement for a deadlier form of debate. And no sooner is Carmelite friar Faricius found stabbed than a Junior Proctor is found hanging from the walls of the Dominican Friary.
What was Faricius doing out when he had not been given permission to wander? How are the nuns at the nearby convent of St Radegund involved? And who is brokering trouble between Cambridge and its rival University at Oxford? The longer their enquiries go on, the more Bartholomew and Michael realise that the murders are less to do with high-minded academic principles, and more to do with far baser instincts.