A taut thriller based on the worldwide best-selling novel by S.J. Watson, "Before I Go to Sleep" is the story of a woman (Nicole Kidman) who wakes up every day with no memory as the result of a traumatic accident in her past. One day, terrifying new truths begin to emerge that make her question everything she thinks she knows about her life - as well as everyone in it, including her doctor (Mark Strong) and even her husband (Colin Firth)

A woman wakes up every day, remembering nothing as a result of a traumatic accident in her past. One day, new terrifying truths emerge that force her to question everyone around her.