Trooper Noll gets a horrific call that a car has rolled off a cliff and into a stream up on a mountain pass. There's no direct contact with the victims, so he must rely solely on text messages with the original informer. Up north in Fairbanks, Trooper Johnson gets a startling call that a man has passed out in his car in the middle of the road, completely unresponsive. Down south in Soldotna, Trooper Tefft is searching for a man who's created a dangerous situation. When the man dropped off his child with his ex, she noticed he reeked of alcohol — and when confronted, he assaulted her with his truck. Finally, back north in Fairbanks, Trooper Worland gets a call from a petrified young girl who says that three masked men had been trying to enter her home.

The Troopers keep the peace during winter's long, dark nights and summer's midnight sun.