Capricorn Anderson (Cap for short) has never watched a television show. He’s never tasted pizza. He’s never heard of a wedgie. And he has never, even in his wildest dreams, thought he’d live anywhere but the Garland Farm commune with his hippie grandmother and homeschool instructor, Rain.

But all this changes when Rain is stuck in the hospital and Cap is sent to Claverage Middle School (dubbed C Average by the kids). Cap doesn't exactly fit in at school, with his long, ungroomed hair and hemp clothes; in fact, he's the biggest nerd around. But when he’s elected eighth grade president as a joke, Cap is more puzzled than ever, and soon the joke grows into something more. Will Cap be the greatest president in the history of C Average or the biggest punch line?