Anna knows Acorn is a special pony. So, when the Pony Pals teach a girl with cerebral palsy to ride, Anna lets them use Acorn. Anna's pony really likes Christine. He even does a new trick for her without any signal from Anna.
Anna doesn't want to be jealous. But sharing a pony can be hard. Then, when Christine comes up with better face-painting designs for the town carnival, Anna can't take it anymore. Do the Pony Pals think Christine is a better artist than Anna? And worst of all, does Anna's pony like Christine better?
(to be added)