Hope and New Beginnings

8 years ago, Sonic lost his siblings. Soon after, he took in and adopted Tails as his new little brother. Recently, he discovered that his arch-rival, Shadow, was created with the blood of his parents, making him Sonic's older brother!
Now, on their 18th birthday, they're back! But a new foe threatens to tear the four Royal Hedgehog siblings apart again! Will evil be defeated once again? Or will the Freedom Fighters fall?