Juniper can create actual worlds with her trusty crayons, but what can she do about a troublesome kid brother who's always stealing her stuff? Simple, since their parents refuse to punish the little pest, she'll do it for them. Juniper will give Timmy a time-out he'll never forget! She decides to draw him out of their world and into one of her own. However, when she feels he has been punished enough and tries returning him home by drawing him back, she finds she is unable to do so.

Timmy has stolen the single crayon she needs to fetch him home. Juniper may be powerless on her end, but Timmy is more resourceful than his big sister would ever give him credit for. Turns out Timmy, stranded as he is in an alien world, is not without resources. Not only does he have Juniper's magic crayon, but he has enlisted Ellie, a young girl he has befriended in this place, along with her trusty Tyrannosaur sidekick Horace, to help. Together they will find a way to bring the lost boy home.