Caterpillar wants to fly like Butterfly, Bumblebee, and Sparrow, and Butterfly thinks his wish may come true.

When Angelina the mouse finds a pink butterfly with a twisted leg, she is determined to look after it and keep it forever until a surprising turn of events sets the butterfly free.

It's almost summer vacation and the students in room 2B are having trouble concentrating on their butterfly project, until a frightening-looking new teacher comes to supervise the Suspension Room and Harry is sent there as punishment for unruly behavior.