A new threat has emerged. A truly twisted oppressive empire led by a cunning ruler seeks to destroy everything in its path. The fight against it truly begins at the start of this story.
Katia, a young white, ginger, and black kitten, accidentally causing a massive power outage after being called a burden. Her power reaches all the way out to the planet, Mobius.
Drawing the attention of Sonic, Tails, and Knuckles. They learn that a large stone like Emerald that originates from Mobius has been found. the Phantom Emerald. Which has the ability to turn thoughts into reality. But they aren't the only ones tracking the source. The evil tyrant roboticist, Dr. Robotnik, back from the Swamp planet after the Death Egg crash in "Sonic and Knuckles", his Imperial Badniks and their allies the Dark Echidna Legion start building a new Death Egg and round up Katia's family and friends.
It is now a race against time to prevent Dr. Robotnik from enslaving Earth and Mobius.