Kirby, Cheyenne and friends discover a portal to Rainbow Land, where everything is in color. However when the Rainbow Waterfall stops working and color fades from the land, they must work together to restore the waterfall and bring back the colors in Rainbow Land!
In Rainbowland there are several different kingdoms, namely Red, Orange, Yellow, Green, Blue, Indigo, Purple. In one kingdom there are two twins who are always together. But because of an event they finally separated. Can they meet again?