AtMidsomerPriory,hometoasmallgroupofnuns,MotherThomasAquinasisstrangledand,shortlyafterwards,asetofsilverworth£60,000isfoundtobestolenfromthesafe.SisterCatherine,themostrecentmemberoftheorder,turnsouttobedescendedfromSirAnthonyVertue,whodonatedthepriorytothenunstwocenturiesearlierandBarnabylearnsthatiftheorderisended..bbb