Cecilia is a waitress in New Jersey, living a dreary life during the Great Depression. Her only escape from her mundane reality is the movie theatre. After losing her job, Cecilia goes to see 'The Purple Rose of Cairo' in hopes of raising her spirits, where she watches dashing archaeologist Tom Baxter time and again.
Vincent Bruce, a war veteran, begins working as an occupational therapist at Poplar Lodge, a private psychiatric facility for wealthy people where he meets Lilith Arthur, a charming young woman suffering from schizophrenia, whose fragile beauty captivates all who meet her.
