When Finbarr returns from the war, he and Nan plan to get married, and they sleep together. During that time, Nan's older sister Colleen gets pregnant, gets kicked out of the house by their father and kills herself. When WWI starts, Finbarr enlists and goes off to war. In Ireland, she meets and falls in love with Finbarr, a boy a few years older who helps out around her Uncle's farm. She grew up in a family of girls in England and spent summers at her Uncle's farm in Ireland. Nan also narrates about her past in Ireland. As he conducts his search, he happens upon Agatha staying at a manor house nearby. Meanwhile, Inspector Frank Chilton is one of the many men searching for Agatha and he also goes to stay at the same hotel. There, Nan comes across her former love, Finbarr Mahoney, who is looking for her. Archie tells Nan to stay away for the time being, and Nan goes North to Yorkshire to stay at the Bellefort Hotel and Spa. The next morning, no one can find her and Agatha's car is discovered hanging precariously off the edge of a chalk pit. Nan doesn't love Archie, but she wants him anyway.Archie goes out to buy an engagement ring and the next morning he breaks the news to Agatha. Agatha and Archie have a daughter, Teddy. In Part I, Nan urges Archie to finally leave his wife, Agatha Christie, who is a well-known writer. The book is narrated by Nan O'Dea, the mistress of Archie Christie, and jumps back and forth from the days around disappearance of Agatha Christie and Nan's younger years in England and Ireland.

The book ends with Nan choosing to marry Archie in order to be with Teddy, Finbarr returns to Ireland, and Agatha goes to be with Chilton. Marston poisoned both her and her husband) once he understands what happened. Chilton covers for Nan's crimes (saying that Mrs. Meanwhile, Agatha engages in a romance with Inspector Chilton, one of the inspectors tasked with finding her. Bess and Nan devised a plot to get revenge/justice by murdering them. Marston are actually one of the nuns from the convent (Sister Mary) and Father Joseph - they had decided to run away together.

Marston) turn up at the hotel Nan is staying at, it turns out that Mr. Agatha's adopted daughter Teddy is likely the baby that Nan had taken away from her, which is why Nan has tried to seduce Archie. In 1929, Agatha ends up seeking out Nan during her disappearance, prompted by Finbarr who showed up trying to win Nan back. She got pregnant and was sent to a convent where the nuns permitted her and another girl, Bess, to be sexually abused by the priest, Father Joseph. In a flashback to her younger years, we learn that Nan once fell in love with a boy in Ireland, Finbarr.

The three-paragraph version: In December 1926, Agatha Christie goes missing for 11 days (resulting in a nation-wide search) after her husband Archie announces he's leaving her for his mistress, Nan O'Dea.

The Christie Affair by Nina de Gramont