Thelma is an ordinary pony who dreams of being a unicorn. And through a little bit of chance, and a strange dash of pink glitter-coloured fate, her dream comes true! Suddenly Thelma is transformed into a unicorn and becomes an international sensation. But fame comes with its price. Fans are screaming and crying, and sometimes they chase her home! Is it possible that fame is not all it's cracked up to be?