Modern medicine is a wonderful thing, but it’s still very much a work in progress. Even the most highly skilled doctors can miss something in a patient, and when they do, the consequences can be disastrous.

24-year-old Susannah Cahalan suffered a harrowing ordeal when she was hospitalized for what doctors believed was insanity. Little did they know that there was much more to her condition than met the eye…

Susannah Cahalan had a promising future. She had a new job, a healthy relationship, and her whole life ahead of her.