The Quick Summary
This is the All Her Fault book summary, by the Irish author Andrea Mara, and be warned, it gives away the whole plot, ending included. If you want a spoiler free opinion, watch my review first.
Here is the summary in one breath. A four year old boy called Milo Irvine vanishes from his school in a wealthy Dublin suburb. The woman who took him is a nanny called Carrie, who has built a fake life to get close to him. Milo is found after seven days, but then the bodies begin to pile up, and a family secret breaks open.
Content note: this book involves a missing child, the death of a baby and several murders, and I’ll mention them plainly.
The Setting
The book was first published in twenty twenty one, and it runs to seventy nine short chapters in three parts. The story is set in November twenty eighteen, in a well off Dublin suburb called Kerryglen, where every second parent has a nanny or an au pair.
Four women tell it. Marissa Irvine is a confident solicitor, and mother of Milo. Jenny Kennedy is a quiet investment banker from Cork, and mother of Jacob, who is Milo’s classmate. Irene is a sharp tongued woman who hasn’t seen her daughter in nine years. And the fourth voice is Carrie herself, in flashbacks, cold, watchful and always acting.
Every chapter is headed with the narrator’s name and a count, like Saturday, one day missing, and flashbacks are tagged with how long before. That clock is why the book races. You always know how long Milo has been gone.
The two mothers have only met once. At the school social in a hotel, they discovered they were wearing the same dress, took a selfie, and walked in arm in arm. Marissa mocked the Coven. Jenny, who is new to the area, decided she had made a friend. That friendship drives the whole book.
Part One: The Wrong House
Part one covers the first week, and it is the longest, forty one chapters. On a Friday afternoon, Marissa goes to a playdate address, fourteen Tudor Grove, to collect Milo. A stranger called Esther answers the door. The text that arranged it, signed Jenny, came from a number that no longer works.
Friday night is a frantic loop of phone calls. Marissa rings every parent in the class. The Irvines’ own au pair, Ana, is not answering, until her phone starts ringing in a knothole of the garden oak, where she left it. She comes back that night, in tears, after a fight with her boyfriend, and says she never collected Milo. The police, Detective Sergeant McConville and Detective Garda Breen, arrive. Milo’s teacher says a minder collected him, and describes the long red hair. It’s Carrie Finch, who works for Jenny.
Meanwhile Jenny is at a work dinner in Paris with her colleague Mark, who clearly likes her more than he should. There was a night in Nantes she tries not to think about. At home her husband Richie, a teacher, has grown cold since her promotion, and his mother Adeline never misses a chance to say that a mother should be at home. When the police call her in Paris, she can only wonder why she was the name chosen.
The Search
By Saturday the story is on the news. Carrie’s photo and Milo’s photo are everywhere, and Marissa and her husband Peter put up posters with Peter’s brother Brian. Jenny, wracked with guilt, turns up at their door, and Marissa lets her stay for tea.
Online, the comments turn nasty. Some blame Jenny for hiring a nanny from the internet, and some blame the Irvines for being rich. At the school gate, three parents known as the Coven, Sarah, Grace and Victor, pick apart everyone’s choices.
In between the chapters we see Carrie in flashbacks. Months earlier she charmed Jenny over wine and gave her a false family: three brothers, dead parents, a house in Wicklow. Almost none of it was true. Adeline picks over her choices too. Jenny even finds a hidden photo of a rough looking young man in Carrie’s room, and an old black top of her own in Carrie’s wardrobe.
Irene’s chapters are different. She learns from the news that her daughter, who she calls Caroline, is missing. She won’t call the police, because she believes that guards are the enemy, and she is much more interested in getting paid. She finds a scrapbook, learns that Caroline knew who her father was, and contacts a tabloid journalist called Faye Foster.
The Suspects
As the days pass, the book scatters suspects around like clues. Marissa’s business partner Colin Dobson takes over her files and is oddly keen to help. Peter’s brother Brian is seen letting himself into an empty show house at the very minute he claimed to be in a pub.
Jenny’s husband Richie is hiding something in his bedside drawer. A client of Marissa’s, Alex Fenelon, sneers at her scar. And a dead man is found in Dublin, a man called Danny Vaughan, whose name nags at Jenny.
Then on Tuesday, day four, Milo’s raincoat is found on the rocks at Killiney Hill. A witness reports a man dropping something off the Obelisk. The police suspect it is theatre.
Part Two: Found
Part two is only thirteen chapters. On Friday, day seven, Milo is found alive, asleep in a locked car in Sandymount, with his hair dyed brown. The car was hired by Carrie under another name. She is not in it.
Through child interviews, Milo gives the police clues, a red brick bungalow, a white door, one grey step. He says a man wearing a mask came for him in the night, and that Carrie called him her little robin.
Jenny notices her son’s chalkboard, where he has spelled out the name Dani Von. She realises it is Danny Vaughan, the dead man, and the police confirm he was Carrie’s old boyfriend, Kyle Byrde, with his hands cut off. A third person is involved.
Marissa, meanwhile, sees a Facebook photo of her business partner Colin sitting across from a woman with long red hair. It is Carrie. And Brian lies about getting his house painted.
Part Three: The Bodies
Part three is the longest after part one, twenty five chapters, and it is where the book turns.
Carrie is found smothered in the Sandymount bungalow. Police break the news to her mother, Irene, in front of the press waiting to hear her story. Jenny finds the childminder ad she posted months earlier and realises Carrie answered it knowing Jacob was about to start at Kerryglen National. She had been planning this for months.
Marissa and Peter confront Colin at his new, grey house. He admits he dated Carrie, who called herself Lena. He cries, but his eyes are dry.
Back at work, Marissa goes through the files she had been worrying about. The Fenelon estate is short by three hundred and sixty thousand euro, and the Downey estate by two hundred thousand. Colin has been stealing for years. That night, someone climbs the stairs to her office and takes the files from her desk while she hides underneath it.
A few days later Colin is found shot beside Carrie’s father, Rob Murphy, in an industrial estate, with a bag of money. Marissa counts four dead, Kyle, Carrie, Colin and Rob, and the police seem ready to call it finished. But Marissa isn’t satisfied.
The Last Secret
On the Friday after Milo is found, Marissa hears that the masked man called her son Milo-Mouse, which is a name only her husband uses. Peter confesses. Carrie had been the driver of a car that crashed into theirs four years ago, just after Milo’s birth, and Peter swapped the babies. Milo was Carrie’s son all along.
Peter also admits he killed Carrie and Rob. I explain every part of that in my ending video, so I’ll stay brief here.
Peter’s argument is that he did it all for the family, and that if the truth comes out, the authorities will take Milo. Marissa tells him it is nobody’s fault but his, and rings the detective on speaker. But in the end she asks only about Kyle, and then she says nothing at all, holding her son. Some time later, in the last pages of the book, a newspaper reports that Peter died in Marbella from a shellfish allergy.
The Rest of the Cast
Back at the school gate, Sarah’s remarks get crueller, and Esther, who runs the tea garden in town, becomes Jenny’s one steady friend. When Jenny’s mother in law Adeline throws Jacob’s teddy bear in the bin, Richie finally roars at his mother. For a moment, it feels like the marriage might survive.
The other threads end quietly. Jenny and Richie work on their marriage, even as Richie’s mother Adeline, who scorns Jenny all through the book, types a new anonymous note on the final page. Irene sells her story and is paid nothing, then moves to Bristol with her husband. And Esther offers to mind Jacob.
Brian’s secret turns out to be an affair. Colin’s was theft. Everyone is hiding something, and almost none of it is the thing the reader thought.
What To Take From It
The author’s note says Andrea Mara lives in Dublin with her husband and three children and runs a parenting blog, and you can feel that in the school gate scenes. The pick up lines, the guilt about playdates and the nanny politics all ring painfully true.
So the summary in a sentence is this. A stranger takes a child, and the real crime turns out to be the one that came first, four years earlier on an icy road.
If you liked it, read the full page on bookexplained dot com, with the characters and the timeline. And if you’re curious whether the Peacock series follows the same story, I’ve done a book versus show video too. Subscribe for more book breakdowns, and thanks for watching.
