Cambridge, 1940. It is the first winter of the war and the snow is falling thick and fast. A college porter, crossing the ancient Mathematical Bridge on his nightly rounds, is startled to hear a child’s cries from help coming from the icy river below.
939, Cambridge: The opening weeks of the Second World War, and the first blackout - The Great Darkness - covers southern England, enveloping the city. Detective Inspector Eden Brooke, a wounded hero of the Great War, takes his nightly dip in the cool waters of the Cam.