A modernizing American has assumed the papal throne. One of His first acts is to select a seventeenth century priest for canonization. The Congregation for the Causes of the Saints recoils in horror at the new pontiff's choice. Against a backdrop of Vatican intrigue and infighting, a long-unsolved crime comes to the attention of a retired detective. The forces that contribute to it reach far back into the distant past. No one can truly fathom the life of the candidate for sainthood including the nun and priest who join forces to prepare the submission to Rome.