In a world plagued by the Daemonia, creatures that take advantage of the negative emotions of people and transform them into monsters, girls from 22 special bloodlines are chosen to wield the power of the Elemental Tarot and confront them. The story follows Akari Taiyo, a 12-year-girl who becomes the wielder of card "The Sun" and joins the mysterious organization "Sefiro Fiore" to confront the Daemonia along other card wielders. However, it does not take long for Akari to learn that with their duty comes an unbearable guilt, as to defeat the Daemonia, the humans afflicted by them must perish as well.
