After Huey has an accident while experimenting, he is sucked into a mirror world of Duckburg and watches as his brothers go through troubles and tries anything to get back to them.
Admiring Duckworth's ghost abilities, Huey, Dewey, Louie, Webby, Lena, and Violet use a spell to turn themselves into ghosts and go on a haunting spree. But their phantom forms leave them vulnerable to Magica's scheme.