Julia and Valentina are 21 when they move to London, planning to live in the flat for at least a year. There are two other flats in the house: Martin lives on the third floor and Robert lives on the ground floor. Martin battles such extreme OCD that he rarely leaves his apartment. Robert was Elspeth's lover of 10 years and is having great difficulty adjusting to her absence. The arrival of the twins has a big impact on both of these men. And Elspeth, who is now a ghost, stuck in her apartment, is in the middle of everything.
The plot gets downright bizarre, but I enjoyed following the twists. Towards the end, I was reminded of Niffenegger's illustrated novels, and could envision her aquatints replacing chunks of the text. Despite the melodrama, at its heart, Her Fearful Symmetry is an examination of consequences, especially the price we pay for lies and lack of fortitude. I liked it much better than The Time Traveler's Wife.