The Turtles, Zach and his friend Caitlin visit the Museum where a magician, the Great Boldini, intends to make a valuable emerald disappear. Everything seems to be going well until the light come back on. The audience sees Boldini tied up, gagged and the emerald is missing. He insists he has nothing to do with it. Everyone at the museum is searched. During the search, the Turtles are revealed and arrested. Zach and Caitlin follow Boldini thinking that he is acting suspicious. They discover that he's working with Don Turtelli and that he did indeed steal the emerald. The Turtles escape and break back into the museum searching for Zach and Caitlin. Down in the basement of the museum the Rat King discovers Boldini, Don and the kids. The kids manage to escape from Boldini along with the emerald but are shortly captured again. They manage to hide the emerald before they are recaptured. Meanwhile, the Rat King decides to work with Boldini and Don in getting the emerald back.