ON THE STEPS OF ST. JOSEPH'S ALTAR LAY THE CORPULENT BODY OF THE BARONESS SLIEMA - STILL, SO IT SEEMED TO THE HORRIFIED NUNS, HEAVING UNDER THE BLOW WHICH HAD STRUCK HER DOWN... Chief Inspector Pearson of Scotland Yard is called in to solve the crime - but the old wealthy Baroness had quarrelled with most everyone in Harrington Convent, and there is no shortage of suspects. What's more, he must deal with a particularly shrewd Reverend Mother, and nuns and students who lead him on a merry chase...