After the events of The Loud House's Sonic the Hedgehog: The Fastest Thing Alive, Sonic moves in with the Louds, becoming a member of the family. While trying to adapt to his new life, Sonic tries to prevent Dr. Eggman from stealing his powers and taking over the world, but with the help of his new family, his human friends, and new friends who are known in the Sonic the Hedgehog franchise.