The world is permeated by Demonia. These creatures will hunt people who experience a high level of negative emotions, and turn them into bloodthirsty monsters. Only the power of the elementary tarot, carried out by girls from 22 special pedigrees, can defeat them. Akari Taio-12-year-old girl who dreams of becoming her deceased mother. She is chosen to wear the "Sun" card and joins the Daemonia mysterious combat organization called "Sefiro Fiore". Shortly after an accession, Akari discovers the terrible truth about how to defeat the demon means to completely eliminate a person, obsessed by the creature.