Alison Courtland, a wealthy New York socialite awakens on a Boston-bound train with no memory of how she got there. A kind, elderly woman helps Alison call her husband Richard to arrange for her return. Upon Alison's arrival, Richard urges her to consult a psychiatrist, but the doctor's bizarre behavior and abusive manner nearly drives Alison mad. Is she really losing her mind or is there an elaborate scheme at play?