The Abbess of Crewe is about the political manoeuvering of Alexandra, who has recently been elected as the head of the Abbey of Crewe. In the first few pages we learn that her ancestry is impeccable, "
fourteen generations of pale and ruling ancestors of England, and ten before them of France", she has electronically bugged the Abbey to listen to the nuns's conversations, and she has a secret, "
most profitable pact" with the Jesuits. She also has a plan to discredit Felicity, the only other contender for the position of Abbess, which unexpectedly results in an "
international newspaper scandal." The remainder of the book explains what happened, and how it started "
merely from the little misplacement, or at most the theft, of Sister Felicity's silver thimble".