The powerful, personal stories of Shaftesbury Avenue are set against the dramatically changing social and political background of post-Great War Britain. The war has ended but Theo Caspar, devastated by his experiences in the trenches, cannot join the celebrations. Letty Lackland wants Theo to star in her latest film. Now a successful film producer, Letty is the linchpin of the large, extended family. Using her studio she brings together many generations of the Lackland and Lucas families.