10 years ago an abnormal area appeared in Tokyo and South America. The area in Tokyo was labeled Hell's Gate and the one in South American was labeled Heaven's Gate. The appearance of the areas caused massive devastation to the area and also replaced the stars with false stars. Not long after the appearance of the Gates, many people started popping who had abilities no ordinary human possessed. Known as Contractors, these people could do things that were before, only imaginable. From being able to control gravity to being able to engulf anything in flames. These abilites came at a cost though, for each Contractor there is a different remuneration. Along with the Contractors, Dolls started appearing, emotionless mediums used to do a variety of things. After the appearance of Contractors, many countries started using them as spies and agents.
5 years ago a war was waged involving many Contractors, around the Heavens Gate in South America. The end result of the was the Heaven's Gate and 1500 mile radius around the gate disappearing on the face of the earth.
Season 1: At present date a Contractor named Hei has come to Japan, assuming the identity of Li Shunsheng, a student from China. He is actually an agent for the group called "The Syndicate". With a blind Doll named Yin, a Contractor stuck in the body of a cat name Mao, and their human leader named Huang. Hei completes a variety of missions which often include fighting dangerous Contractors, while searching for his sister who disappeared with Heavens Gate.
Season 2 (Gemini of the Meteor): 2 years have passed since the events in Tokyo. Suou Pavlichenko has been living a somewhat normal life with her brother Shion and their father. Everything changes when their home is attacked by an unknown faction. With her father dead, Suou must team with Hei, the doll July and Mao in order to find her brother and in the process find out who she is.
The Black Contractor: Gaiden (OAV): Following the events of the first season, The Black Contractor: Gaiden follows Hei and Yin as they flee from the Syndicate. As things progress Hei begins to notice changes in Yin that are not normal for a doll. The four episodes link the first and season and explains how Hei and Yin were separated and how Yin progressed into becoming Izanami.
Darker than BLACK - Kuro no Keiyakusha
Darker Than Black: Ryusei no Gemini
Darker than Black: Gemini of the Meteor
Kuro no Keiyakusha: Gaiden
The Black Contractor: Gaiden
Opening: "HOWLING" by abingdon boys school. (Season 1 Episodes 1-14)
"Kakusei Heroism ~The Hero Without A Name~" by An Cafe (Season 1 Episodes 15-25)
"Tsukiakari no Michishirube (Guidepost of the Moonlight)" by Stereopony (Season 2 Episodes 2-12)
"DARKER THAN BLACK" by Yasushi Ishii (OAV 1-4)
Closing: "Tsukiakari" by Rie fu. (Season 1 Episodes 1-14)
"Dreams" by HIGH and MIGHTY COLOR (Season 1 Episodes 15-25)
"From Dusk Till Dawn" by abingdon boys school (Season 2 Episodes 1-12)moreless