A magical theater atop a cobblestone path alters what a couple knows about themselves—and each other—in this scintillating debut brimming with nostalgia and life-affirming wonder.

At the end of a fog-covered alley, glitters a glamorous cinema. It’s nearly impossible to find. 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....