A once vibrant and lively beauty in her youth, Roseanne McNulty has spent the majority of her adult life confined to a mental hospital in rural Ireland. She has been institutionalized for so long, no one seems to remember why she was hospitalized in the first place. When a new chief psychiatrist takes a keen interest in her, he finds a hidden memoir she has written over the course of decades. It unravels the mystery of her incarceration, telling the tale of her passionate, yet tortured, life.