Meimi is an average student at St. Paulia's Academy by day, but at night, she becomes the mysterious and magical thief- Saint Tail! With the guidance of her best friend Seira, a nun-in-training, Saint Tail steals back treasures that were unjustly taken from the innocent. Despite her virtuous motives, she is still pursued not only by the police, but also by her classmate Asuka Jr.