The movie business is booming in 1935 when 21-year-old Loretta Young meets 34-year-old Clark Gable on the set of The Call of the Wild. Though he's already married, Gable falls for the stunning and vivacious young actress instantly. Far from the glittering lights of Hollywood, Sister Alda Ducci has been forced to leave her convent and begin a new journey that leads her to Loretta. Over the course of decades, they forge an enduring bond of love and loyalty that will be put to the test when they eventually face the greatest obstacle of their lives.