16 year-old Lumi meets a slightly insane ghost named Bastion while working as a maid for a temperamental lord. Bastion tells her he was murdered, and he shows a deep hatred for Lord Erebus, but did Erebus murder Bastion, or was there more to this confused story? Lumi has to learn to deal with a difficult boss, while ignoring a ghost hurling insults at him over her shoulder, all the while wondering if the surly, but affectionate Erebus may have killed her new friend.