Pony and Birdboy tells a story of seven-year-old girl Pony, who doesn’t want to go to school, and big-mouthed Birdboy who has solution to all possible problems. Humoristic family-film Pony and Birdboy is partly based on Veera Salmi’s popular children’s book The Book of Pony and Birdboy, which rich humor and anarchist hustle have brought the book as a favorite of children.

A new orphanage opens near Jill and Joy's house, and a boy named Pekki runs away from there. Pekki ends up living in Jill and Joy's cabin and tells the girls how bleak life is in the orphanage under the strict command of the headmistress Minna Pinna.