Manga adaptation of the novel "Yami no Moribito", which is the second novel in the Moribito series after "Seirei no Moribito". All the Moribito novels have standalone plots.
After the events of Seirei no Moribito, Balsa returns to her birthplace in Kanbal to revisit her past with Jiguro, the man who raised her. When she finds out that he has been implicated for the death of the king, she fights to clear his name, and on the way uncovers the hidden part of Kanbal.