"Sonic the Hedgehog" is adapted from the popular video game produced by Sega. Sonic (voiced by Ben Schwartz) is a blue hedgehog who originally lived happily on his own planet. However, the evil forces coveted Sonic's super speed and wanted to take away this unique skill. In order to protect Sonic, the kind owl foster mother gave Sonic a pack of magic rings, which could help Sonic teleport to a safe planet. In this way, Sonic came to Earth and landed in Qingshan City, Montana. At first, Sonic lived very comfortably here and made a group of friends. When the government discovered Sonic's existence, everything became complicated. The government sent the evil scientist Dr. Eggman (Jim Carrey) and ordered him to capture Sonic and conduct terrible scientific research on him. In order to avoid Dr. Eggman's pursuit, Sonic and Sheriff Tom (James Marsden) must go to San Francisco to obtain the magic rings lost there.