Once again Callie is forced to take part in her mom's latest crusade. They head into ranch country to camp—bloodthirsty mosquitoes, stinky outhouses and all—at a protest to save a rural school. Callie's grandmother shows up with her biker buddies and the singing grannies. Callie hates camping and wants nothing to do with the protest. To make matters worse, Callie's only possible ally, her cousin Del, is mad at her. The last time Callie visited, she was thrown from Del's horse, Radish. Callie claimed the horse was vicious and now Del's parents are forcing her to sell Radish. Callie wants to help her cousin, but she's terrified of the horse. Del is just as tenacious as the rest of Callie's family, and Callie is forced to admit that she's not going to be allowed to go home until both the horse and the school are saved.
Callie's mother has chained herself to the neighbor's tree and is living inside the treehouse. She refuses to come down until the neighbor, Mr. Wilson, agrees to leave the tree standing. Soon reporters arrive to interview Callie about her mother's protest. Callie doesnít want to talk to anyone. More chaos ensues when Callie's grandmother invites the "singing grannies" to help save the tree, the neighbor's biker friends come to her aid, and Callie's friends show up to try to get themselves on TV. Callie needs to figure out how to get her mother to come down from the tree so that her life can return to normal.