In matters relating to the world of the dead there is one institution which judges the sins of the deceased: The Ministry of Hades. The summon section of the judgement bureau comprises of groups supporting the ministry's operating functions by guiding the lost souls that wander the mortal world. They are known as the Guardians of Death. Descendants of Darkness (or Yami no Matsuei) is an animated adaptation of four case files from the 11 volume manga series by Yoko Matsushita which is currently being released in English by Viz.