The United Britain beauty contest comes to Slaughter Abbey, where one of the three favorites is found dead in the swimming pool. Sister Boniface deduces murder from a blow to the back of the head. Sam is instructed to cooperate formally with Scotland Yard's reputed Detective Chief Inspector Winner, who is sent from London to oversee the investigation, but make sure he doesn't crack the case, while Felix hopes finally to transfer to Scotland Yard. The victim was disliked by her fellow contestants, whom she tried to have disqualified for breaking contest rules. The murder weapon was a stiletto heel. Organizer Lesley Canon is suspected of illicit relationships, possibly blackmailed as such revelation would wreck his career. DCI Winner has Felix arrest Miss Glasgow, who won her title by default when the winner was disqualified, after her sash is found near the pool with the victim's blood on it, even though it was not there when WPC Peggy Button searched the area. Sam and Sister Boniface look for the owner of the stiletto, and a burnt birthday card confirms a motive for murder, rooted in a dark personal scandal.
—KGF Vissers