Kaida has led an uneventful life in a small mountainside town. Her father is a blacksmith and her mother his assistant with her as their only child. Everything seems normal. Perhaps her father does get a bit angry when people talk about the Dragon Purge but that's just a quirk. Centuries ago, Dragons ruled the kingdoms. Able to change into a human at will, the Dragons were at first benevolent. But power corrupts and the Dragons became more and more demanding.
So, the humans rebelled and over-threw the Dragons. Most Dragons were killed and the rest went into hiding. Only one Dragon is known to exist, an elder male. His name is unknown and he lives deep in the mountains, far from any humans. He hasn't been seen in hundreds of years.
So, life is normal and boring for Kaida. Until the dragon hunters come calling. She watches in terror as her parents show themselves in a new light, show themselves to be Dragons. They fight the hunters in their true, Draconian form, buying enough time for Kaida to escape.
Now homeless, scared and hunted as a Dragon, Kaida flees to the only place she can think of. She runs to the Elder Dragons lair, she's praying he'll help her. That he'll teach her, she doesn't know anything about her powers or abilities. She can't shift forms and she can't use magic.