Each night, after falling asleep, Christine, the forty-year-old car-crash survivor who now suffers from anterograde amnesia, loses all her memories back to her twenties. And each day, Christine finds herself waking up next to Ben; the perfect stranger who claims that he is her husband. To compensate for her utter inability to form new recollections, Christine faithfully keeps a meticulous and illuminating video diary after her psychologist Dr Nasch's directions, hoping to piece together her fragmented existence. Little by little, sudden and uncomfortable flashbacks start to unravel the thick mystery of Christine's deep trauma; but, in the process, whom should she trust?