Volume four of the popular children's sci-fi series. Years into the future, aliens and humans try to live in peace and harmony - but can they? While Earth opens its doors, the Power Rangers open an academy to develop the next generation of highly trained peacekeepers. It's none too soon when a planet-conquering alien force turns its destructive attention to Earth. When A Squad goes missing, B Squad must rise to the occasion. To join the fray, they must join forces, using teamwork, intergalactic weaponry and light speed Zord vehicles to battle evil. All that stands in the way of Earth's demise and the fall of our universe is the newest breed of Power Rangers.