DCI Barnaby is adapting to life with baby Betty when he is interrupted by a phone call from DS Nelson. Artist Suzie Colebrook has been electrocuted by a booby-trapped roulette wheel sent in the post shortly after she discovered a break-in at her home.Suzie illustrated the Jed Dagger detective novels written by late Luxton Deeping author George Summersbee. She was also the executor of George’s estate. The murder comes as a local crime writing festival is about to unveil a newly discovered Dagger story - and her publisher husband Niall seems more concerned that the priceless manuscript has been stolen than that his wife has been murdered.The festival itself is a hotbed of tension between George’s daughter Bella, a bookshop owner and sole beneficiary of her father’s will, and her mother Jeanie, while Bella’s partner Rob Mead is stressed about money. Organiser Maggie Markham is in her element promoting her GP husband Nick Summersbee’s memoirs about his famous brother.Nelson discovers the electrocution mirrors a plotline in the first Dagger novel ‘The Wheels of Justice’, except that in the book roulette wheels are posted to two victims.