In a fictional community at the southwestern tip of Australia, we meet Tom, a lighthouse keeper and WWI veteran who is haunted by the trauma of war, and Isabel, a lively, bold, adventurous young women who has a comfortable life in town.
An unlikely courtship brings the two together and when Tom takes a posting as a the lighthouse keeper of Janus Island - little more than a rock in the middle of the ocean. Marriage to Isabel soon follows, and the population of Janus island doubles overnight.
As a lighthouse keeper, Tom takes comfort in the routine, regularity, and rules of his trade and is meticulous in his work. Isabel, more surprisingly also easily takes to life at the lighthouse, bringing a lively sense of home to their isolated, remote abode.