"Can Sonic save a city in crisis ... or has he finally met his match? Dr. Eggman has launched his most extreme plan yet and Sonic's already racing to catch up! As Dr. Eggman drowns entire cities in his Metal Virus, creating hoards of Zombots -- civilians infected with the virus to become easily manipulated machines -- Sonic himself struggles to keep his infection in check! And when Sonic's friends start falling victim, it's clear no one is safe!"--Provided by publisher.