One summer morning, Banana jumps out of bed, thrilled about his new idea. He has to hide his idea from everyone, especially his sister Pear who cannot keep a secret, but Pear has her own plan. She's going to follow Banana and see what he's up to.

Banana carries a big jar outside and puts his idea into action. He catches one beautiful butterfly in his jar and then another and another. He eventually catches all the butterflies in town, unaware that Pear has been watching him the whole time. He takes the butterflies into his bedroom and sets them free, happy to be surrounded by his new friends.

However, the next day, Banana realizes the neighbors are not happy because all the butterflies have disappeared. Everyone in town is sad, so Pear steps in to help her brother with his butterfly problem. They learn to get along and be good siblings. Together, they bring beauty and joy back to the neighborhood.