From the cover: "Clarence, ninth Earl of Elmsworth, has good health, a large income and a first-class ancestral home with gravel soil and rolling parkland.  But these blessings count for nothing in the presence of a certain Sir Gregory Parsloe: Lord Elmsworth is convinced he has evil designs on his pre-eminent pig, Empress of Blandings.

It is fortunate for Lord Elmsworth that there is at least one member of the family upon whom he can rely.  The Hon. Galahad Threepwood is at hand."

Though Galahad, or Gally, couldn't have done it without the help of, yes, Beach the butler.  And what are they needed for?  Empress is a huge pig, winner for the last few years in the Fat Pig Contest.  Sir Gregory's pig doesn't even come close, but he has a reputation for trying everything in and not in the book to win important matters like this contest.  So Gally and Beach have to do their utmost best to design counter-strategies, and discover the evil plans of their opponents.

Mix that with some pangs of love and a lot of misunderstandings, and add a lovely sarcastic view on the British upper class in rural areas, and you have Wodehouse at his best.