As New York City is invaded by alien creatures who hunt by sound, a woman named Sam fights to survive with her cat.
Two highly trained operatives grow close from a distance after being sent to guard opposite sides of a mysterious gorge. When an evil below emerges, they must work together to survive what lies within.
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 in every way, Team Sonic must seek out an unlikely alliance in hopes of stopping Shadow and protecting the planet.
