The Rangers manage to retrieve the Sword of Light from the Deserted Planet before Serpentera blows up the whole world! Rocky, Adam, and Aisha, proving themselves yet again by destroying the sleep machine, are chosen to replace the departing Jason, Zack and Trini as the Red, Black, and Yellow Rangers! Lord Zedd now has both the Silverhorns monster and Serpentera targeting Angel Grove! Will the three new Rangers' first mission be their last?