Three junior high school girls hear a voice pleading for them to save Cephiro, a magical world where belief is power. It is Princess Emeraude, the Pillar, whose will maintains the peace. When the peace is threatened, she uses her last bit of strength to summon forth the three girls destined to become Magic Knights and save her world. Step into a world where will power determines all and your beliefs become magic. Hikaru, Umi and Fuu must master their own hearts, fight against evil, and save the alternate world called Cephiro!