School's out!Addie Brown has survived her first year in London. Now she can't wait to ditch her tie, chuck her school shoes, "Mary and Jane", under the bed, and forget all about Math(s) for six glorious weeks back home. As she flies off to Chicago to visit Aunt Becky and reconnect with best friend Lauren she wonders if this could be: The. Best. Summer. Ever?

But nothing's ever straightforward for Addie. Blindsided by Dad's surprise new girlfriend, Addie arrives at summer camp only to discover London has followed her there. Join Addie as she navigates family dynamics, messy friendships and even a bear, all with a little help from the mysterious lady in the green hat.