Heart in pieces post-divorce, Lucy Winthrop visits Saguaro Valley, home of her mother's friends, Ben and Leonora Morgan. While staying at their ranch, Morgan's Run, she meets Ben's younger brother, Richard. Her new neighbor back east, Richard is a self-made billionaire who goes after what he wants, and he wants Lucy. Back home in New England, they begin a white hot love affair. As the heat pumps up, Lucy tries to step back, scared...