Lilia was a smart, ambitious, attractive woman around 30 years old with a successful career. Her success is all the more impressive considering she's not exactly human - at least not all the time. She is able to assume human form part of the time for her day-to-day life, her career, and to be able to be amongst humans. But she has been unwilling or unable to give up her other form - what she considers her true form.
Rather than jeopardize her success in the human world, she tells no one of her secret. Not even her best friends nor her boyfriend knowns. But no secret can stay hidden forever...
How does she maintain her human form? (magic spell or medallion? drinking a serum or potion? some kind of trigger such as moon phases or water?)
What is Lilia's true form?
Who discovers her secret?