World War I has come to an end. In a German village, Anna (Paula Beer) mourns the death of her fiancée, Frantz, who was killed on the front in France. Her parents are eager to marry her off to another German suitor, but she’s unwilling to entertain the option. She perks up with the surprise arrival of Adrien (Pierre Niney), a lanky Frenchman with a sexy mustache, who claims to have been close friends with Frantz, and taught him to play the violin. Initially, Anna’s father wants nothing to do with the man. Adrien proves to be such a charming presence, however, that even Anna’s family soon come around to embracing him, unaware of the true reason Adrien has come to visit the family.
Filmed mostly in black and white, colors are used only when the memories of Frantz are recalled, creating deeply moving scenes.