You lived on your own, in a forest outside the city, eating raw prey items such as birds and fish. You'd never even spoken a word of any language. And never interacted with a human or any other devil in your entire life. you hadn't even heard of those things, only aware of wildlife and your own existence..
A broke, unemployed girl with a nursing degree who just can't seem to find a job... until she finds an ad in the paper for an insane asylum. The job is as a simple caretaker, so it's not exactly the height of what she could do, but it payed... surprisingly well, and offered a place to stay on nights she was too tired...