Sonic moves so fast the story can barely keep up with him, and that's exactly the point. This isn't a show trying to be faithful to the games or build some grand mythology, it's pure kinetic chaos wrapped around a single, perfect premise: a robot made in Sonic's image that fights exactly like he does, so speed becomes useless. You're watching the one thing that can match Sonic's greatest weapon turn into his nightmare, and the OVA knows that's all it needs to be.
Sonic springs into action when Dr. Eggman holds the president and his daughter hostage. His demand is that Sonic travel to Eggmanland, stop Black Eggman and shut down the city's generator before it overloads and explodes. Sonic and his friend Tails head out, but the mission is a trap: Eggman plans to activate Hyper Metal Sonic, a robot counterpart he built to destroy the hero. The two-episode OVA mixes action, adventure and comedy with fantasy and science fiction elements.