Nicole Kidman wakes each morning with no memory of the last 14 years, leaving loving husband Colin Firth to patiently explain who he is every day.

Mark Strong is a neurosurgeon whose surreptitious gift of a camera helps her to slowly piece her past together. But the more she discovers, the more scared she becomes – and who can she really trust?

Kidman’s disorienting plight is both affecting and chilling, but the plot’s cunning twists are too predictable for the film to grip as tightly as it should.