Luna is a strange mare. Cadance is only now just starting to see how strange she is when Luna mentions the unthinkable. Maybe she'll learn something new in the process.
Starlight Glimmer finally graduates from Twilight's program, and is told to find a student of her own! Twilight recommends going to a new planet, inhabited by "He-you-mains". She tries to make a friend, but finds something more!
Frustrated with her sister's free spirit and new adventures, Luna resolves to find something new to live for, now that she is retired. The answer: A power metal band. And who better to join her on her quest than the Nightmare Knights?
Sisters are supposed share everything. Secrets, experiences, feelings, knowing silences... but sometimes first a silence must be broken for sisters to truly understand one another.