After enduring the brutal realities of the Western Front, Tom Sherbourne seeks solace as a lighthouse keeper on the remote Janus Rock, off the coast of Australia. Accompanied by his vibrant wife, Isabel, the couple navigates the aftermath of war but face fresh turmoil with Isabel's tragic miscarriages. One day, a mysterious boat washes ashore with a dead man and a crying infant. Struggling between morality and Isabel's deep-seated desires, they make a fateful decision to raise the child as their own, a choice that will echo across the lives of others and challenge their deepest values. 'The Light Between Oceans' unravels a poignant tale of love, anguish, and the consequences that ripple through time when one strand of moral fiber is broken.