Robin returns to Great Slaughter as super model Birdie, where she again sees her childhood friend WPC Peggy and her mother, with whom she has a difficult relationship. While there, her manager Max is found dead.
Sister Boniface and the gang are horrified to discover all the hallmarks of a ritualistic human sacrifice in the nearby forest. Witches, sacrifices and a book once thought destroyed now becomes key pieces in solving the murder. What is "The Book Of Secrets" and what connection does it have to the church?
Convinced that events catastrophic to the Cold War are being planned at the British Open Chess Championships, Sister Boniface must brush up her chess skills and join the tournament.
Felix is Police Advisor on set of the latest "Oh - Do Behave!" picture. Felix is soon called to action to investigate the murder of the abrasive director Sexton St Juste.