I have no idea what the story is here but I was thinking that it would be super cool to tell a story from multiple POV (three in my head) that are all actually the same person but find a way to hide that from the audience reading it. 

So you have the young, the teenager, and the grown up, they all go by different names, act differently based on maturity levels and life lessons, etc.  you blur the line and make the adult seem like she's the young girl's mother (yes I see the main character as a female here again).

Story backdrop could be anything as simple as romance, but maybe as complex as abuse and the damage, it does to a person.