The knight Antonius Block's chess game with Death is the image most people carry away from The Seventh Seal, and it is also the film's clearest statement of what it is actually about. Block does not play to win; he plays to stall, buying time in which he hopes to perform one act he can call meaningful before the game, and his life, end. What he settles on is small and specific: shielding a family of traveling performers from Death's notice long enough for them to escape the plague sweeping the countryside.
The film takes its title, and its opening epigraph, from the Book of Revelation 8:1, "And when he had opened the seventh seal, there was silence in heaven about the space of half an hour," a verse Bergman uses to frame the entire film as taking place inside that silence, a God who does not answer and may not be listening. Block's crisis is explicitly a crisis of that silence: he says outright that he wants not proof exactly, but some sign, however small, that his prayers are heard by anyone at all, and the film never gives him one.
Set during the Black Death of the fourteenth century but shot in a stark, almost theatrical black and white that owes more to medieval woodcuts than to historical reconstruction, the film reads less as a period piece than as an argument staged in period costume, one Bergman, raised in a Lutheran parsonage as the son of a court chaplain, described as drawn directly from his own unresolved relationship with the faith he was raised in.