Christine (Nicole Kidman) wakes up next to a man (Colin Firth) she does not recognise. Panic stricken, he slowly explains that he is her husband, and that she suffered a terrible accident that has given her amnesia. Every morning, Christine wakes up a stranger and every night her memories fade into nothing.

With the help of Dr Nasch (Mark Strong), Christine is trying to regain her memory. That is, until one day, when new terrifying truths emerge that force her to question everyone around her and what really happened to her on the day of her accident...

Based on the worldwide best-selling novel, Before I Go to Sleep is a tense and chilling thriller written and directed by Rowan Joffe.