Broke and hopeless in 1929, Yo O'Keenan flees the violence of his home in Chippendale, and by some miracle charms his way into a job on the Harbour Bridge, a new start for himself and his little sister, Agnes. Meanwhile, on the north side of Sydney, in her cluttered cottage at Lavender Bay, a young and ambitious costumier, Olivia Greene, works on her latest millinery creations, dreaming of taking her colours to Paris, London, New York. A random encounter in the Botanic Gardens sparks a powerful attraction, even as the gulf between this pair seems wider than the blue mile of harbour that divides the city. By mid-1932, the construction of the Bridge is complete, but Sydney is in chaos, on the brink of civil war, as the Great Depression begins to bite - hard. And then Yo disappears. Against the glittering backdrop of Sydney Harbour, The Blue Mile tells of the cruelties of poverty, the wild gamble a city took to build a wonder of the world, and the risks the truly brave will take for a chance at life and love.