Sonic, Knuckles, and Tails reunite against a powerful new adversary, Shadow, a mysterious villain with powers unlike anything they have faced before. With their abilities outmatched, Team Sonic must seek out an unlikely alliance.

O agente do FBI, Danny McNamara e Lexi, uma esperta ladra de objetos de luxo, precisam encontrar um dos tesouros mais valiosos do mundo e impedir os planos de um terrorista.