Planet Terra once shone as a jewel in the cosmos, but decay and conflict have pushed it toward catastrophic collapse. Dr. Chaco is the only one who knows how to save it: seven mysterious crystals must be gathered to make the rainbow system work. Chaco announces a race to find the crystals, concealing his true ambition to use their power to build his own dynasty across the universe. Rick enters the competition riding Hamos, unaware of what Chaco intends. Along the way he learns the secret of the crystals and sets out to revive Terra, which puts him in open conflict with Chaco over the seven crystals and the rainbow system. The result is an action adventure with a fantasy bent.