One day, Duncan is happily coloring with his crayons when a stack of postcards arrives in the mail from his former crayons, each of which has run away or been left behind, and all of which want to come home.

"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...