Master animator Chuck Jones has created this full length fantasy, his first since being name director of MGM's animation department. A young boy (Butch Patrick) is bored with his life in San Francisco and finds himself in a fantasy land where letters and numbers are at war with each other. He drives through the Phantom Tollbooth and into an animated fantasy land. The voices of Mel Blanc, June Foray and Daws Butler are featured in this story taken from the book by Norton Juster. The boy tries to rescue twin Princesses Rhyme and Reason, who have been banished to a castle suspended in mid air above the kingdom.