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 zombified 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! Collects issues #17-20 of the Sonic the Hedgehog series.