Chris and Gail's investigation into a messy highway accident leads to the discovery of a license plate matching an Amber Alert for a missing nine-year-old girl. Division 15 embarks on a massive manhunt to find the girl and the car's missing driver. Meanwhile, an intense interrogation of the parents uncovers disturbing evidence. More secrets unravel, as the entire division races the clock to find the young victim - hoping it's not too late