Twelve-year-old Misty and her two cousins, Aidan and Brooke, are mokos—protector spirits—who recently combined their magic to save Brooklyn’s carnival celebration. Now they’re excited about Uncle Andrew’s upcoming art exhibit at the Brooklyn Museum. He has chosen to create a piece centered around a Benin Bronze, one of several artworks that were looted from Nigeria in 1897, and the cousins are treated to a private tour of the Metropolitan Museum of Art in New York to help him choose it. When Misty views the bronzes for the first time, she is transported into a long-ago memory of an oba (king) who was stern and angry. And that’s just the beginning of the trouble. Once the selected bronze is delivered from the Met, the Brooklyn Museum is overrun with dust bunnies that attack people. A mysterious force controlling the dust begins to pull innocent victims into artworks and trap them inside. The cousins are going to need a lot of help—BIG help—to defeat this fearsome foe.