When the glow of youth fades and the nest empties, four women find themselves in a new stage of life - a time to let their hearts play a new melody. Kristin Robinson returns to teaching as her husband takes early retirement due to an injury. Now that their children are gone, she hardly knows the man she married. Can she hear a romantic September Sonata when her heart tends toward discord? Abby Martin is ready to sell her business and start a new chapter...