Annie and Julia both grow up in a mansion in San Francisco, but only because Annie is the daughter of Julia's nanny. Class differences aside, they are like sisters...until Julia spreads some rumors about Annie during high school. Then they go their separate ways (and to emphasize how different they are, isn't it appropriate that Julia goes to Stanford and Annie goes to Cal?). Ten years later, they are thrown back together and Julia offers to fund a cupcakery for Annie who is now a baker.
One very good thing about the book is that the descriptions of cupcakes are mouth-watering.
Overall though, it was cheesy, predictable, and yet very readable. It was a rainy, rainy weekend here in California, and this book is perfect for rainy weather.