A woman with a time machine visits past versions of herself in an attempt to undo and prevent all the mistakes and humiliations of her past. Unfortunately her past selves are too stubborn to listen to her nagging advice and insist on finding things out for themselves. In the end the voyage becomes a lesson in embracing the positive from the past and not dwelling on the pain.
As someone who has had many heated imaginary conversations with past versions of myself, this book spoke to me. I no longer think confronting myself in the past would be an effective strategy for self improvement. I suspect in my case it would end in a lot of eye rolling and bitter sarcasm.