Ten-year-old Peter O'Banyon's life changes forever when his family dies in an accident. Orphaned, he goes to live with his garrulous Uncle Billie, the keeper of the Port Hope Island Lighthouse in Massachusetts. There, as the beacon leads sailors home, Peter learns an astonishing truth about Billie's past-- and the power of love. This message guides Peter's life, even when World War II's brutality rocks his faith, even when he returns to his young bride and an unimaginable tragedy. Now, in the final days of his own life, Peter needs to pass on the lighthouse keeper's secrets to his own daughter, but to do it may take nothing less than a miracle...