The Phantom Tollbooth, based upon the children's adventure novel by Norton Juster, tells the story of a bored young boy named Milo. Unexpectedly receiving a magic tollbooth and, having nothing better to do, Milo drives through it and enters a kingdom in turmoil following the loss of its princesses, Rhyme and Reason.

Lovable Sulley and his wisecracking sidekick Mike Wazowski are the top scare team at Monsters, Inc., the scream-processing factory in Monstropolis. When a little girl named Boo wanders into their world, it's the monsters who are scared silly, and it's up to Sulley and Mike to keep her out of sight and get her back home.