The magnificent Austin empire built by the domineering Seth Coleman before World War II now belongs to Moss and Billie's daughter Maggie. She has invited the whole family—and several hundreds guests—to a Fourth of July barbecue in celebration of a renewed sense of family pride she's determined to forge at Sunbridge. But as loved ones gather, they bring along old resentments and new temptations destined to generate more than a little heat.
Finally Maggie has decided to divorce Cranston Tanner. But as she struggles to be a good mother to her resentful son Cole, her love for a special man could cost her the loyalty of her family. In the meantime, Cole becomes locked in a bitter rivalry with his cousin Riley, heir apparent to Sunbridge, who is open and loving—and in very serious trouble— while Maggie's vulnerable daughter Sawyer, a brilliant aeronautics engineer nursing a broken heart, is about to face a much greater tragedy. And Maggie's sister, Susan, the renowned musician, arrives home for the most terrifying performance of her life.