After Sonic and his friends and all their people abandoned the planet Mobius because it was being destroyed by the villains, they were forced to go to Earth where they would hide after a small robbery they made with some cars. They did not realize that those cars are transformers known as autobots that went to Earth for the same reason. Now the 2 sides must join forces to defeat the Badniks and Decepticons after they discovered their hideout and plan to dominate there.
