AletterforMissMarplefromarecentlydeceasedfriendpromisesalargerewardforinvestigatingacrime-withouttellingherwhowasinvolved,orwhenithappened!Whensheaccepts,sheisgivenareservationforacoachtourofhistorichomesandgardens.Shehasfifteenfellow-passengers-andoneofthemknowsamurderer'ssecretandsomeoneispreparingtokill.