Akari Taiyou lives with her aunt, uncle, and cousin Fuyuna. She dreams of becoming a fortune teller like her deceased mother, and her mother's tarot deck is her only link to her mother. During one of her dreams, she encounters a plant monster that she defeats as a stronger version of herself, only to discover that the monster is Fuyuna, who has vanished from everyone's memory. After battling more of these monsters, Akari encounters three magical girls from Sefiro Fiore who save her and explain their mission to use Elemental Tarot to battle Daemonia, individuals possessed by evil. Akari also discovers that she is a magical girl and the inheritor of The Sun card. However, as she adjusts to her responsibilities, Akari struggles with the decision to save or eliminate the Daemonia. In addition, serious threats emerge both inside and outside the organization, putting her loyalty to the test.