In the early 1920s, a young Australian named Rex Rivington abandons his education and leaves his comfortable family home in Melbourne to lead a colourful, but directionless life in the outback. He eventually recognizes his ambition to be a medical doctor, and he rejects his itinerant life to resume his education. Rex wins it big in a poker game with a four of diamonds, enabling him to bankroll his education. He finishes medical school, but his plan to further his education and study surgery in Scotland is thwarted by the Second World War. Adventure and tragedy dominate his wartime postings in remote outback towns in Queensland and the Northern Territory, and he eventually settles into a country practice in Victoria, becoming a much loved country doctor. "Four of Diamonds: An Australian's Journey" is a moving story of triumph and tragedy in a time of transition in Australia, as well as a saga of one man's dedication to his dream.