It is the year, 20XX AD. The evil organization known as "Skulldier" is hell-bent on taking over Japan - well, right after they finish lunch - with a device known as the "Gen Drive". But one man stands in their way... Gun Caliber! He may be your average, miserable, Smartball Parlor employee in Old Town, but when evil rears its ugly ass. he transforms into the gun-slinging superhero!