Blank white walls, they were a perfect metaphor for her life. Blank, empty and devoid of detail, her mind was a void.
They tell her she was in an accident, they tell her she had been depressed and may have attempted suicide. That explained why they treated her the way they did and the lack of sharp objects in the room, not even a mirror to break.
She sat on her bed staring at the wall wondering who she was, why had she been so unhappy and thinking she might not want to hear the answers.