It's the Institute science fair and Ellis and Taylor discover a mysterious symbex that causes them to swap brains! In order to swap back, they need to solve the puzzle of the symbex and… dive into a shark tank…

The Institute is shutting down and Taylor and Lila are leaving Rock Island! On one last adventure to break into the Institute South Section, they're busted by Raquel, but are shocked to find out she wants to help them find Uncle Charlie too!