What film or book is it that follows a mentally ill patient and shows them being cured years later?

Hopsalot: What film or book is it that follows a mentally ill patient and shows them being cured years later?
I think the person may have been schizophrenic or bipolar, I’m not sure. It might have been a film following a group of people that had been cured.
I should say it is a documentary.

Answers and Views:

Answer by SundaeRose
Sybil ( Sally Field played the part of the mentally ill young woman)