Lieutenants Raymond Paul Parer and John Cowe McIntosh, flying their PD' G-EAQM Airco de Havilland DHg single-engined bi-plane from England to Australia arrived in Calcutta in 1920. It's an epic journey of daring risk-taking, adventureperseverance and survival to fly throughout the Empire navigated by two airmen and their indomitable plane 'PD' which were tested in just about every way as they encountered many obstacles and scrapes along the way.