In December 1918, traumatized military Tom Sherbourne is temporarily hired as lightkeeper to work alone for six months at a lighthouse at Janus Rock, Australia. He meets joyful local girl Isabel Graysmark and they fall in love. Soon they marry and Isabel moves to Janus Rock with Tom. During the next years, she has two miscarriage; while grieving her second loss, Tom rescues a rowboat on the shore with a dead man and a baby girl inside. When he is ready to report the incident, Isabel persuades Tom to keep the baby as if she were their child. Tom reluctantly relents and they name the baby Lucy. At Lucy's baptism, Tom sees a local, Hannah Roennfeldt, praying at a grave and he learns that she is Lucy's real mother. He writes an anonymous note to Hannah telling that her missing daughter is safe and sound. When Tom meets Hannah again four years later, he takes an attitude that will change the lives of many people.—Claudio Carvalho, Rio de Janeiro, Brazil