Page Clarke is a good mother, busy taking her seven-year-old son, Andy, to his baseball games and keeping careful watch over her fifteen-year-old daughter, Allyson, who is trying her wings and testing her limits as she grows toward adulthood. Page's husband, Brad, is busy, too, with business meetings that often take him away from their suburban San Francisco home. But overall Page feels blessed with her happy family and comfortable marriage--until one Saturday night, when everything falls apart in an instant.