The Irish R.M. refers to a series of books by the Anglo-Irish novelists Somerville and Ross, and the television comedy-drama series based on them. They are set in turn of the 20th century west of Ireland.
Major Sinclair Yeates discovers the top brass won't promote him beyond major, so he decides to resign and take a post as the Resident Magistrate in West Ireland. Yeates soon discovers his new landlord hasn't been completely honest with him and everything Yeates does somehow ends up back-firing on him.