Irene Jacob plays a fashion model whose lovely face is hugely enlarged on a red banner no one in Paris can possibly miss seeing. Striking up a relationship with an embittered former judge (Jean-Louis Trintignant), who secretly scans his neighbors' conversations through electronic surveillance, Jacob's character becomes an aural witness to the secret lives of those we think we know. Kieslowski cleverly wraps up the trilogy with a device that brings together the principals of all three films.