In the continent of Orlantis, where magic and steel are intertwined, undead magic is regarded as a taboo among taboos, and those who touch it will be subject to the most severe judgment by the Holy Light Church and the major kingdoms. Young Ella was once one of the most promising apprentices at the "Grey Tower" Magic Academy, but was expelled from the apprenticeship due to an unexpected soul experiment and wandered to a forgotten land on the edge of the continent.
In desperation, she accidentally discovered a broken ancient book - "The Holy Book of Bones". This legendary forbidden book not only did not drag her into madness and destruction, but revealed to her another unknown side of necromancy: an ancient skill about balance, protection and the essence of the soul.
When her former classmates become knights chasing her, and when the lurking dark forces begin to covet the power of the Holy Scriptures, Ella is forced to embark on a path that makes her the enemy of the entire world. She summons loyal skeleton warriors and silent ghost servants, not only to survive, but also to find the legendary "Dawn Emblem" that can purify the undead and bring true rest, and to uncover the millennium truth that undead magic has been stigmatized.