Mary's grandmother Emer is very ill and in the hospital. Her mother, Scarlett, is trying to come to terms with her inevitable death. Mary is sad that her best friend has moved away, but meets the new neighbor, Tansey, an older woman who seems somehow familiar. It turns out that Tansey is really Mary's great grandmother, who died of the flu in the 1920s, and has come back as a ghost to help Emer. When Scarlett finds out about this, she arranges for Emer to get out of the hospital for a little bit, and the four travel back to the farm where Tansey and Emer lived.
This is a hugely atmospheric book-- I felt like I was having tea in Mary's Dublin kitchen! I didn't know that Maeve Binchy's books were particularly Irish until I read this. There is something about the cadence and the emphasis on multiple generations of families that is similar. I will look up some of Mr. Doyle's adult books.