Luca, the little boy, goes on an adventure to save the world with Megan, the pretty Unicorn, who slides into his dream one night from the rainbow. They go to the forest to find the giant grey squirrel, who has the Apple to Colour' to cure the 100-year-greyness' that has come over the world. Read this beautifully illustrated Unicorn tale to know how Luca and Megan trick the squirrel into giving them the Apple of Colour' to bring back colours to the black, white and grey planet. A must-read for every child.