A senator's family has been threatened--and now one of them is missing. Can Mac and Dana find Sara before it's too late? The senator had raised this niece as his own daughter. So when she doesn't return home and her abandoned car is found in a parking garage, it alarms not only the family but law enforcement agencies throughout the Northwest. The only clue: a set of menacing letters sent to the senator's office. Now it's up to Oregon state police...