A fast blue hedgehog, named Sonic, and his best friend, a yellow two-tailed fox named Tails, have always been best friends/neighbors when living in the peaceful town they live in. However, when they were chasing down a bandit that stole some rings, Sonic and Tails discover a giant ring portal. Once they touch it, they suddenly find themselves in a vast unknown island, known as Green Hill. Then, that's where an unexpected adventure begins, when they meet new allies including Sally Acorn, Rotor The Walrus, Amy Rose, Marine The Raccoon and Big the Cat, and find themselves being forced to take down a villainous inventor, named Dr. Robotnik, and his newfound partner, Knuckles the Echidna.
