Best friends Maude, CJ, and Tiny are so excited to start third grade at Boo Academy (affectionately called Boo La La), the world's premier haunting school! The ghost girls love their new dorm mother, Ms. Finley. But she has some strange characteristics that make them think that she might be... human. Could it be?! The ghost girls are determined to find out, for the sake of their school -- and the entire ghost world!