Thisseriesissetinthelonghotsummerof1959andweddingseasonisinfullswingintheCambridgeshirevillageofGrantchester.　　AstheReverendWillDavenportuniteshappycouplesinholymatrimony,DetectiveInspectiveGeordieKeatingisbusyaseverinvestigatingarangeoflocalmurdercases.Withanewdecadejustaroundthecorner,thequestionofwhatthefutureholdsisoneveryone'sminds,notleastWill's,butbeforethe50srolloverintotheswingingsixtiestherearesomecrimestosolveandsomelife-changingdecisionstobemadethatmightchangelifeinGrantchesterforever.