Lila Greer has always loved mysteries, even when they scare her. When a spooky storm blows into Blue River Creek and Lila is startled awake by a strange shrieking shadow, she knows something is afoot. Stranger still, Lila and the Questioneers discover that on the night of the storm, someone broke into Iggy's parents' art gallery and stole all the paintings for the new exhibit. Could the mysterious shrieking shadow have something to do with the missing artwork? Ms. Greer and her Questioneers will have to use their detective skills to solve the mystery of the missing paintings before the exhibit's grand opening, or the gallery might have to close forever!