Los gatitos están muy exaltados, dicen que en las montañitas han visto un dragón y nadie les cree? pero Mía y los suyos correrán a investigar si lo que dicen los pequeños es cierto, y ¡qué sorpresa se llevarán!

Book Day is coming up and at Mia's house everyone is so excited that Linus spend the day reading stories about princesses and dragons. So when the kittens Flower, Sunshine, Grey, Flash and Buf claim they have seen a dragon in the Little Red Mountains, nobody believes them, but Mía.

She is convinced that there is some truth in what they say and sets out to investigate with Lía and her pet friends. They will go deep into the mountains to find Dreki -A very homely veggie dragon who has always lived there and only comes out when it is really necessary. He also has powers. That's why you've never seen him before. Or maybe you have, but you haven't recognised him. With Dreki, you never know.