At the end of a dark alley, a magical cinema glitters with The Story of You on the marquee. When Ellie and her fiancé, Drake, stumble upon it during a late-night walk, they’re shocked to discover what’s playing inside the red-velvet auditorium: their formative memories. Uneasy about what the theater might reveal, Drake hesitates, but Ellie, haunted by a fractured night from her past she can’t fully remember, insists they return. As their memories projected on the screen inch closer to the present, they realize they’re both keeping secrets from each other. With their wedding on the horizon, Ellie and Drake must decide if revisiting their pasts will alter their vision of a future together.