Mila thought Rosie would be her best friend forever. But when Mila refused to fork over her candy at lunch Rosie dumped her. And this was just the beginning to a week filled with a picture day mishap, a "show and tell" disaster, and a smooshed apology cupcake. Mila worries that every week will be like this week and she'll never get her best friend back. But spunky Mila perseveres and the week ends well, with her friendship intact.