A collision with the Paradox Prism sends Sonic to a parallel world called New Yoke City, where the dull environment looks oddly familiar.

A power outage gives two rebels a chance to break into a lab where the Chaos Council is studying Sonic's strange connection to their energy source.

To secure the Prism Shard, the rebels battle the Chaos Council. Then Sonic makes a startling discovery about the events that shattered his world.