When an imagination impairing disease infects the Castle of Imagination, the Rainbow Dream Trains embark on a global treasure hunt to find the hidden cure. Using the spirit's power, Nina transforms herself and Danielle into a pair of eagles to guard
Olive the Green Dream Train invites Danielle and Nina to come with her to plant special trees that can heal the atmosphere better than other trees can. A mysterious angel guides them, and the Dark Phantom tries to mess everything up again.
