Olympic hopeful Ally is in the midst of preparations for one of the world's most challenging yacht races when news of her beloved father's death shocks the accomplished sailor. Saying goodbye to the love of her life, a man her family knows nothing about, she rushes back to her family home, an enchanting chateau where she and her five sisters -- each adopted as infants -- were raised on the shores of Lake Geneva. When new tragedy strikes on the high seas, pummeling Ally yet again with a terrible and unexpected loss, she turns her back on the water and instead follows her own North Star -- an intriguing clue left by her father which leads her to Norway and the promise of unmasking her origins. Surrounded by the majestic beauty of an unfamiliar homeland, Ally begins to unpack the century-old story of a remarkable young woman named Anna Landvik.