Lighthouse keeper Tom Sherbourne (Michael Fassbender) and radiant, spirited Isabel (Alicia Vikander) live together in married bliss on a remote, rugged island off the coast of Australia. But their windswept world is turned upside down when Isabel learns that she's unable to bear a child. One day, a drifting lifeboat washes ashore with a crying baby in it. The dilemma the couple now face will echo far beyond the island, engulfing the irrevocably impacting their world--and that of a stranger (Rachel Weisz)--in a passionate story about love, hope and a fateful choice.