The film is set on the remote edge of Western Australia in the years following the Great War. Tom Sherbourne, a shell-shocked veteran, devotes himself to his new job as lighthouse keeper on Janus Rock, which is surrounded by nothing but the vast sea.
He intends to remain alone, but unexpectedly meets Isabel Graysmark, a young woman who is grieving her two brothers lost in the war.
Despite the obstacles, their love flourishes and they are soon married. The couple try to start a family, but are devastated after they lose their baby. Then, one night, a mysterious rowboat holding a dead man and an infant girl washes ashore, setting off a chain of decisions that come with shattering consequences.
This is a story of fate, love, moral dilemmas and the lengths one couple will go to see their hard-fought dreams realised.
A combat veteran haunted by time spent on the battlefields in a brutal war, he arrives in Western Australia, trying to escape the looping cycles of grief, guilt and trauma by becoming a lighthouse keeper.
Beautiful, spirited and determined, she, like Tom, has been through trauma and felt a great loss with both her brothers dying in the war. She decides to pretend that the infant who washes ashore is her own daughter.
A woman who clings desperately to the unlikely hope that she will one day find her husband and baby lost at sea.