Teruja untuk menjadi wira, Sonic berpasukan dengan rakan baharu Tails untuk menghentikan Dr. Robotnik dan Knuckles si Echidna memperoleh zamrud yang berkuasa.
Seorang syerif membantu landak kecil makhluk asing dengan kelajuan supersonik untuk lari daripada doktor gila yang mahukan kuasa istimewanya demi menakluk dunia.
Sonic, Tails, and Knuckles encounter an abandoned Badnik drone which upgraded itself using parts from a junkyard, with the intention of conquering the world.
While escorting Dr. Eggman and his hapless new helper Trip through a perilous ruin, Fang the Hunter will need to muster all his cunning to overcome past mistakes and escape the coils of a fierce new enemy. Meanwhile, Eggman discovers what may be the key to his next dastardly scheme.
Based on the well-known video game.