The two hedgehog brothers named Kaleb and Sonic arrive on Earth after being forced to leave their home due to villains wanting them for their super-speed powers. They enjoyed their times there but is lonely until they meets Sheriff Tom Wachowski. After Kaleb and Sonic's powers cause a major blackout, they are pursued by mad scientist Dr. Ivo Robotnik. The brothers try to use their each separate bag of rings to teleport them to a new home, but they lose both of them through a ring portal to San Francisco after Tom finds them and tranquilizes them. He reluctantly helps the brothers go find them after Robotnik finds them and tries to catch them. After evading Robotnik and a few other problems, Tom gets help from his wife Maddie Wachowski, an veterinarian to help Sonic and Kaleb get home. They find the rings, but Robotnik finds them using one of the brothers’ quills to power his technology. Kaleb and Sonic gets Tom and Maddie to safety as they are both chased across the globe by Robotnik, until they end up back in the Wachowskis' home in Green Hills. Tom helps Kaleb and Sonic fight back against Robotnik, and they use a ring to send him to a mushroom planet. Kaleb and Sonic stays on Earth with Tom and Maddie after getting adopted into their new family, but Robotnik is making plans to go back to Earth using Kaleb and Sonic's two quills. Meanwhile, a two-tailed fox creature named Miles "Tails" Prower arrives on Earth to find Kaleb and Sonic.
