Pearl's older sister, Lexie, is in eighth grade and has a boyfriend. Pearl's only boyfriend is the family's crabby cat, Bitey. Lexie is popular. Pearl is not, mostly because of the embarrassing Three Bad Things that happened in school and which no one has forgotten. Everything Pearl does seems to drive Lexie crazy. On top of that, their grandfather is moving into their family's apartment and taking over Pearl's room. How will these sisters share without driving each other crazy?

Pearl is good at making lists of rules, but sometimes, life doesn't play by the rules!