Monologue of Universal Transverse Mercator: Egg Man [独白するユニバーサル横メルカトル Egg Man]

A psychopathic killer known as Egg Man has been caught, incarcerated and is awaiting his death sentence. Karen, a beautiful and brave police woman, is assigned to the "Egg Man" case to find the whereabouts of a missing dead body. Egg Man meets his cellmate, Prisoner 205. Who is Prisoner 205? Is Prisoner 205 another in-mate awaiting his death sentence as well or an android utilized by the police to collect information about him and his knowledge of the corpse? Who is really manipulating whom?