Every once in a Blue Moon the Firefly Fairies organise a Tournament in the Fairy World. When the Blue Moon rises, seven rainbows shoot across the night sky and show the entrance to the Fairy World.
Every child can participate in the Tournament. There is only one catch: when a child enters the Fairy World he/she must take the form of his/her favourite animal and must keep it until the very end of the contest.
This story is the story of a boy named Peter whose favourite animal is the unicorn.