After many years of University and Army training, 21-year-old Struan Kenrick is given two weeks leave before being transferred to a new position in Darwin. On arrival at the airport close to the family properties, Struan learns from his oldest brother, Euan, that their youngest brother Sawney is being ostracised by their grandparents, making him isolated and depressed. Determined to improve the situation for his baby brother, Struan organised for Sawney and him to go on a short holiday, firstly on the Indian Pacific train, and then a stay on Rottnest Island, but things take a dramatic change once on the train.