In Pixieville a new rainbow appears and, like all the other rainbows, it gives magic energy to the Tree of Life to feed the MagicPops. According to the legend, at the end of every rainbow there is a hidden treasure. The Pixies will have to stop both the Gnomes and the Elves, who are hunting for the treasure: if the treasure is stolen, there won't be anymore rainbows in Pixieville!