Daisy and Agnes have always had each other. And that's all they've ever needed - or wanted, at least. So when Agnes's mom drops the bombshell that she and Agnes are moving at the end of the summer, the girls are crushed. All seems lost until the pair unearth 'The History of Everything,' an old friendship scrapbook with the ultimate bucket list to make their last summer together unforgettable. But when Daisy starts dating a charming drummer, her social calendar suddenly has less room for her best friend. Insecurities bubble to the surface, and Daisy and Agnes begin to question if their friendship is meant to last the summer, much less forever.