It is 1916 and a woman awakens in a field hospital in France. She wears a British nurse's aide's uniform but has an American accent. With no memory of her past, she knows only that she can drive an ambulance, and that her name is Stella Bain. While she tends the wounded, the gaps in Stella's psyche plague her. Desperate to find answers, she sets off for London, where she is taken in by Dr. August Bridge, a surgeon who becomes fascinated with her bizarre symptoms. Delving into her fractured mind, Bridge unlocks a disturbing history -- of deception, thwarted love, and betrayal. As her memories come racing back, Stella must embark on a new journey to confront her haunted past.