>Sonic (Schwartz) is a tearaway teenage rebel hedgehog living in the forest near Green Hills, Montana. He was mutated by experiments by Doctor Robotnik (Carrey), along with several other animals, who escaped years ago and now live in peace. Tails and Knuckles aren't mentioned in the script, but it can be inferred they're around.
>Doctor Robotnik's experiments centered around ancient golden Incan rings, which the animals took with them when they escaped.
>Sonic is restless and wants to see the world. He's caught speeding in Green Hills town and arrested by the sheriff, Tom (Marsden). He quickly becomes a viral sensation online, and draws the attention of Dr. Robotnik, who comes to Green Hills to get back the rings.
>Despite Tom trying to protect Sonic, he's captured by Robotnik and taken to his government lab. Tom is able to break inside with the help of town locals who have befriended Sonic, and together they free him.
>A last stand takes place in Green Hills as Robotnik launches an assault with gadgets and robots he's created, but is foiled by traps laid by the townsfolk and Sonic.
>Robotnik is blown up, survives, and is then arrested for his illegal experiments becoming public. Sonic is hailed as a hero, but rather than wanting to see the world, he decides he wants to stay and protect his home, Green Hills.
>Ends with him running down a highway.
