Ever since she was a filly, whenever she has been at her wits' end and didn't know what to do, Crystal Chime has had something strange happen - her reflection gains a life of its own and helps her overcome her problems with good advice and emotional support.

As she grows up, however, she begins to notice more and more that the one she talks to has a personality and knowledge that is no reflection of her own, and begins to wonder who exactly has been giving her this advice, and why. However, as it only happens when she is in the middle of an emotional crisis, she is hardly in a state to start questioning the apparition as it appears.

Who is the Mare in the Mirror, and what is her interest in this up-and-coming singer?