Sixty-five million years ago, the legendary, transcendent Energems were given to ten dinosaurs for safekeeping by an alien named Keeper. But when Sledge, an intergalactic bounty hunter, attempted to acquire the Energems, his ship was blasted into space, leading to the extinction of the dinosaurs and the Energems being lost with them. Now, in the present day, Sledge is back and starts sniffing around Earth looking for the Energems in order to harness their power and annihilate the world, so a team of Power Rangers form to find the Energems first and fight the bounty hunter and other threats with dino-powered swords, blasters, Zords, and Megazords.