In 1939, Cathy lives happily with her family in Australia, oblivious of the onset of WWII in Europe. In England, young Tom, devastated when his mother leaves the family home in Leeds, is determined to enlist as soon as he is of age. He joins the Royal Navy and is sent to the Far East, arriving in Sydney. Tom meets dance teacher Cathy at a ballroom, and it soon becomes obvious they are destined to be together. But what are their chances of keeping their romance alive when it is inevitable that, once the war is over, Tom must sail back to England?