Is it easier to hear distress than to see it? An immersive incursion into the reality of 911 dispatchers will convince you otherwise. Follow the daily lives of these behind-the-scenes heroes, who are the ears and eyes of their territory at all times. Every second counts as they deploy emergency services and decipher what's happening on the other end of the line. If they fail to grasp what's at stake, the whole intervention chain is derailed. First Line provides unprecedented access to calls from 911 dispatch to emergency scenes in the field.