Prue and her classmate Curtis are drawn into a forbidden magical forest filled with enchanted creatures, loyal allies, and formidable adversaries as they embark on a desperate quest to save Prue’s kidnapped baby brother, Mac, from the crows led by a mysterious woman named Alexandra.

Gromit’s concern that Wallace is becoming too dependent on his inventions proves justified, when Wallace invents a “smart” gnome that seems to develop a mind of its own. When it emerges that a vengeful figure from the past might be masterminding things, it falls to Gromit to battle sinister forces and save his master… or Wallace may never be able to invent again!