One day, a mare calling herself Illusion, moves into Ponyville. However, not all is quite what it seems with this new mare in town. She's living a double life and one that may catch up to her. How will she and others handle it? A story of a transgender mare, dealing with her transitioning and just wanting to live life without it getting in the way. But things just can't be that simple.

Sex tag not so much for the act, but some rather frank discussion and usage of certain terms related to such.