The earth was separated 65,000,000 years ago due to the collision of the meteorite supposedly killed the dinosaurs. The Dino Earth appeared and was swallowed in a dimensional rift that occured due to the magnetic interference from the meteorite collision. The Dino Earth is where all the dinosaurs went. Now, there was way that the ones from Dino Earth come to our dimension and dangerous results occur. RyuuJin (Dinosaur people) are the inhabitants of Dino Earth.
AbareBlack was fighting the forces of Evorian on Dino Earth. When the Evorian escape through a transdimensional portal to our dimension, he followed. There three Bakuryuu (Tyrannosaurus, Triceratops and Pteranadon) were under evil control and were attacking Tokyo. A call was sent out to Ryoga, Ranru, Yukito, Sugishita and Imanaka. The destined ones soon got the powers and were able to tame the beasts. The three Abarangers now have their mission to defeat the Evorian's threat on their dimension.