**Main Title: Darker than Black - Kuro no Keiyakusha Type: TV Series, 25 episodes Year: 06.04.2007 till 28.09.2007 PREVIEW** In Tokyo, a bizarre field appears that is impossible to analyze. Coinciding with this "Hell`s Gate" is the appearance of humans possessing new forms and new powers. These criminally insane beings are fearfully called "Contractors" and sometimes brutally murder others.