Kat, who loves to make maps of all sorts of places and things, gives a special map to Jack.

"Poor Duncan just wants to color. But when he opens his box of crayons, he finds only letters, all saying the same thing: his crayons have had enough! They quit! Beige Crayon is tired of playing second fiddle to Brown Crayon. Black wants to be used for more than just outlining. Blue needs a break from coloring all those bodies of water. And Orange and Yellow are no longer speaking -- each believes he is the true color of the sun. What can Duncan possibly...

A lonely girl draws a magic door on her bedroom wall and through it escapes into a world where wonder, adventure, and danger abound. Red marker in hand, she creates a boat, a balloon, and a flying carpet that carry her on a spectacular journey toward an uncertain destiny. When she is captured by a sinister emperor, only an act of tremendous courage and kindness can set her free. Can it also lead her home and to her heart's desire?