Octavia Philharmonica has achieved everything she ever dreamed of. Thanks to her skill, talent, and friends, she has risen to the rank of Court Musician and has earned the right to perform for the Princess and the nobles as frequently as she could want. Yet the musical scene of Canterlot is never still, and she learns that a new musician is taking the city by storm. At first, Octavia's interest in the musician is merely professional, and she wants only to learn more about his new style of music. However, as she is drawn deeper into his concerts, she learns that this newcomer harbors a wicked secret, and his phenomenal success may have more to do with dark magic than music. Octavia will need to use all of her ability and strength to expose the truth and stop him, or the entire city may fall under his sway.

Though AU, the only thing you need to know from the setting (Lunaverse) is that Luna is raising both the sun and the moon. Anything else relevant will be covered in-story