Mia Channing appears to have an enviable life: a beautiful home, a happy marriage, a job she enjoys and three grown-up children to whom she's devoted. But appearances can be deceptive...When the family gathers for her son's 30th birthday, he brings with him his latest girlfriend who, to their surprise, has a nine-year-old daughter. Then, before the birthday cake has even been cut, Mia's youngest daughter Daisy has seized the opportunity to drop a bombshell. It's an evening that marks a turning point in all their lives, when old resentments and regrets surface and the carefully ordered world Mia has created begins to unravel.