SONIC THE HEDGEHOG 3 opens with a mysterious hedgehog with superpowers named Shadow escaping a military prison where he’s been held for 50 years. Shadow eventually teams up with Dr. Robotnik and Dr. Robotnik’s grandfather, who are both bent on revenge against Earth. They’re after a powerful weapon created by an international military and law enforcement agency protecting Earth from alien threats. Sonic and his friends, Knuckles and Tails, must stop them, but these adversaries are very powerful.