In Centopia a great test for the unicorn foal is standing on, they are to bring plants to grow, but some foals are envious Onchau, because for him it is to have an easy plant to grow.
So the little unicorn foal goes with his elf friends in search of the sugar flowers that each foal is to get to the exam passed.
However, they come Gargona previously, this collects all flowers and destroy them, as the 4 (Onchau, Mia, Mo and Yuko) come to the scene, they found not only the flowers but also destroyed hoofprints and black hair and so learns Mia the Place de the black unicorn.
Is the black unicorn really so evil and has actually destroyed the flowers, listen for yourself and find out!
An exciting adventure for big and small fans of Mia and Me, unicorns and elves, highly recommended!