In the blink of a summer, Bea goes from having a best friend and a place she belongs to being dropped and invisible, eating lunch alone and only talking to teachers. The end of sixth grade and the start of Camp Amelia can't come soon enough.
But then the worst part of school, ex-best friend Maisy, shows up in Bea's safe place and ruins it all. Maisy lands in the same bunk as Bea and summer suddenly seems dire. Never having camped a day in her life, Maisy agrees: it's hopeless. She should be at home, spending time with her little sister and hanging out with her super popular crew of friends—not at this stupid adventure camp failing everything and being hated by everyone. In a desperate bid to belong, Maisy offers Bea a deal: if Bea helps her fit in at the camp, she will get Bea into the M & M's, their town's popular clique, when they enter seventh grade in the fall. The Popularity Pact is born.