At the end of the MEGAFORCE season, although the advance team of Warstar villains were defeated and the evil Vrak went into hiding, the Rangers were horrified to discover an entire alien Armada fleet invading Earth in full force. Robo Knight was seriously damaged in the battle and mysteriously disappeared. Without him, the Rangers were left alone to face the greatest threat the world had ever seen. As the SUPER MEGAFORCE season begins, the Rangers help to rebuild the city after the initial onslaught from the Armada. We get our first glimpse of the latest invaders, led by a spoiled and ruthless Prince Vekar and his generals Damaras, Levira and their cyborg warrior Argus. Desperate to please his father the Emperor, the evil Prince is determined to finally destroy the Rangers and take over the Earth. To combat this greater threat, Gosei gives the Rangers special Morphers and Keys that will help them unlock all the powers of the Legendary Power Rangers. With their new Battle Gear, they are now able to morph into SUPER MEGAFORCE RANGERS and by using the special Keys the can remorph into any team of Rangers from the last 20 years that they choose. They also gain access to the powers, weapons, Zords and Megazords of all the different Legendary Ranger teams. But in order to fully unlock all of these new powers, the Rangers must first learn about the past Rangers and master their ways. In addition, Jake (Megaforce Black) is given a Green Super Megaforce Key rather than a Black one, but before Gosei can explain why, the Armada attacks again and the Super Megaforce are off to battle armed with their new powers. But they are not alone in their fight. They will soon be joined by a 6th Ranger…the Silver Ranger – an alien bent on revenge against the Armada for destroying his home planet, who will help them access even more Legendary powers. It’s a super-mega season, with super-sized villains and super-sized powers that can only be handled by the SUPER MEGAFORCE.