Two hedgehog siblings have been living on Earth for years until a recent accident in baseball game. Follow Sonic and his sister Y/N as they travel along some crazy adventures that will change everything. Especially, when they meet their favorite people, Tom and Maddie. Will they have to leave the planet after they were discovered, or will they stay here on Earth? Let's find out.

After settling in Green Hills, Sonic and Y/N are ready for more freedom and making their mark as heroes, well mostly Sonic. Y/N just simply wanted a normal life to explore around the world she'd ever seen. Tom and Maddie agree to leave them home while they go on vacation. Tom counted on Y/N to keep an extra eye on her brother, which she agreed. But, no sooner are they gone, when Dr. Robotnik returns, this time with a new partner, Knuckles, whom Y/N had known since they were kids, in search for an emerald that has the power to both build and destroy civilizations. Sonic and Y/N teams up with their new friend/sidekick, Tails, and together they embark on a journey to find the emerald before it falls into the wrong hands.

Knuckles agrees to train Wade as his protégé and teach him the ways of the echidna warrior. Throughout his journey, his relationship with his childhood friend Gwen grows much stronger than he had expected.

Sonic, Gwen, Knuckles, and Tails reunite against a powerful new adversary, Shadow, a mysterious black hedgehog with powers unlike anything they have faced before. With their abilities outmatched in every way, Team Sonic must seek out an unlikely alliance in hopes of stopping Shadow and protecting the planet. But all Gwen sees is that Shadow is driven by anger, revenge, and pain... Will she be able to save him from the pain he suffered??