Their magic tree house takes Jack and Annie back to a monastery in medieval Ireland, where they try to retrieve a lost book while being menaced by Viking raiders.
When a peaceful monastery in Québec is shattered by the murder of their renowned choir director, Chief Inspector Armand Gamache and Jean-Guy Beauvoir of the Sûreté du Québec are challenged to find the killer in a cloistered community that has taken avow of silence.
The peaceful town of Crozet, Virginia, is turned upside down by a statue of the Virgin Mary that begins to cry tears of real blood, as Mary Minor "Harry" Haristeen and her sleuthing pets search for the truth about a local unsolved mystery.