The circus comes to Sleepy Hollow everyone is thrilled, especially Harry Moon. That is, until Harry and his Good Mischief friends uncover something suspicious under Clive Cantaloni's Big Top. Harry sets out to uncover the truth, but this time it's not all about magic. Harry gets help from the new kid, Jules Arthur lll who answers the call of duty, just like his military dad. With a bit of magic and a lot of "special ops," the gang snoops their way into Big Top's secret.