The first narrative feature by Joshua Oppenheimer, one of the leading documentary filmmakers of our time, is a post-apocalyptic musical set in a lavish underground bunker built inside a former salt mine. For the past 25 years – since Earth became uninhabitable due to ecological collapse – Mother (Tilda Swinton), Father (Michael Shannon), and their Son (George MacKay), who has never seen the outside world, have lived there in isolation. Bound by daily rituals, they’ve managed to preserve a sense of normality – until the unexpected arrival of a stranger, the Girl (Moses Ingram), shatters their carefully maintained routine. As tensions rise, their seemingly idyllic life begins to unravel.