On the Parks Highway ' the busiest stretch of road between Anchorage and Fairbanks ' a head-on collision between an SUV and semi-truck shuts down the highway. Trooper Anderson arrives at the scene to find those in the SUV badly injured, and must work quickly with the emergency crew to save those whose lives are on the line. Across the valley, Trooper Noll responds to a burglary in progress and drives head-on into imminent danger, chasing after the suspect on ice-covered roads.