After Link leaves on a voyage he finds himself far away from his Princess with almost no hope of getting back to her.

After the events of Sonic the Hedgehog 3, Grace-an immortal alien hedgehog gifted with chaos powers and energy-sets off on a quest to find Shadow the Hedgehog. She discovers him lost, suffering from amnesia and haunted by deep and painful memories of his past. But a new darkness is rising. An evil sorcerer, desperate to steal Grace's powers, has allied with another alien who has his own plans for Shadow. Now, it's up to Grace to help Shadow recover his memories-and for Shadow to protect Grace in return. Together, they must face the growing threat and fight to save the world before it's too late.