Six-year-old Mia loves going to the carnival. She loves eating ice cream. But she also loves saying 'No'. She loves 'No' so much that she rarely uses 'Yes'. So, one day, feeling sad and left out, 'Yes' packs its bags and leaves. And in the days that follow, Mia realizes how she is unable to say 'Yes' even to the carnival, to ice cream and to all her favourite things!