As if life weren't complicated enough, teenager Rocket Malone has just learned that her mysterious Aunt Polly is actually Polyhymnia, a Greek Muse who desperately needs her help. Now Rocket needs to juggle middle school and apprentice Muse training, learn how to ride Pegasus and blow glass, stand up to Zeus and catch a crazed nymph named Echo -- all without losing her best friend or looking like an idiot in front of her crush Ryan.