Rory and Derek are best friends forever.... At least that's what they think—until they meet Bolivia. She's visiting next door all summer and everyone wants the three of them to be buddies. But since she's a girl, Rory and Derek decide to ignore her completely. Except it's not so easy to ignore someone who has her own pet parrot and who likes to make snowballs—out of ice-cream! Derek starts thinking Bolivia's the funniest, craziest kid he's ever met, but Rory still says three's a crowd. Is there room in their friendship for Bolivia, or is she about to break up a perfect team?