D.Gray-man is the story of Allen Walker, who roams a fictional 19th century Earth in search of Innocence, a mysterious substance used to fight demons called akuma.

Allen continues his transformation into Nea, the mysterious Fourteenth inside him. When a shocking revelation from the Millennium Earl traps Allen in Nea's spirit world, he desperately seeks to understand the entity that's using him like a puppet. Perhaps his own past can offer some clues...