Valentina dreams of becoming a trapeze artist but believes she will never be able to make it because she has Down's syndrome. Her grandmother – who teaches her to play chess and sing a lot of songs – always encourages her to never give up: If caterpillars can turn into butterflies, nothing is impossible. We must never feel disenchanted nor lose the desire to learn; look at me, I'm still determined to be an orchestra conductor one day! But Valentina is not very convinced, she thinks that a worm is too disgusting to become a butterfly... What is this metamorphosis that Grandmother talks about like?