A cloister murder mystery with an extraordinary woman of the High Middle Ages A gruesome series of murders shocks the nunnery of Corbeil, where several nuns have been found strangled. The Abbottess Roesia, while investigating the murders, happens upon a mysterious chronicle that the first victim, Sophia de Guscelin, wrote just before her death. Upon reading it, the Abbottess learns that Sophia, in order to indulge her passion for reading and learning, stooped to deceit, betrayal, and even murder. Yet why were all the others who happened to read the chronicle also killed?