Every morning, Natalie wakes up believing it's five years ago—a traumatic brain injury stole her recent memories, and each day her neurologist husband Ethan patiently fills in the gaps. But when she discovers a hidden journal in her own handwriting, the entries reveal a chilling pattern: Ethan's stories change, his timelines shift, and the medication he swears will help her might be the very thing keeping her trapped. Then Natalie sees him in a parking garage with a woman who's very pregnant, and suddenly the gaps in her memory feel less like tragedy and more like a carefully constructed lie. As she begins secretly documenting every conversation, every inconsistency, every moment he thinks she'll forget by morning, Natalie realizes her husband isn't just hiding an affair—he's built an entire second life on the assumption she'll never remember long enough to fight back. Now she's in a race against her own failing memory to expose the truth before he convinces everyone, including herself, that she's too unstable to be believed.