The story takes place in a magical country full of magic. Lianna (voiced by Kelly Sheridan) and Alisa (voiced by Cassidy Ladden) are a pair of good friends who can talk about anything. They have a common hobby, which is singing. By chance, Lianna and Alisa found a magic mirror. In the mirror, there lived an elf named Melody (voiced by Maryke Hendrikse). Melody told the two girls that there was a place called "Diamond Castle", which was a paradise for music lovers. However, the evil muse Lydia (voiced by Kathleen Barr) appeared and wanted to monopolize the castle. Now, Melody has the key to the castle in her hand. She wants to use the power of the girls to defeat Lydia and regain her freedom. The road to the castle is very long. Can the two innocent and kind girls complete the task smoothly?