The young Yumiko discovers that she can learn magic at the Anehara School of Magic. On the way, she meets Jean-Jacques Guibarthez--a man who wants her staff and will kill her to get it.

The storyline goes back in time when Koyomi arrives at the Anehara School and meets Misa, who, after a series of unusual events, agrees to teach her Modern Magic.

Daemons have been released, and Yumiko asks Koyomi to help her vanquish them, unaware that the only magic Koyomi can perform is summoning washbasins.

A trip to the water park turns chaotic. Misa seeks to find the source of the virus that brought the Daemons. The ladies prevent a possible disaster.

The past and present stories are told together. In the present, Koyomi travels back in time. In the past, the reason for Guibarthez's pursuit of the Kerykeion is revealed. Misa resolves to fight Guibarthez.

Yumiko and Guibarthez finally meet for battle. Yumiko and Misa show up to help. Recalling past advice from her parents gives Yumiko the tools to defeat Guibarthez.