Wildlife biologist Alex Carter lands a job studying a threatened population of polar bears in the Canadian Arctic... but as her study progresses, and she gathers data on the health of individual bears, things start to go awry. Her helicopter pilot quits unexpectedly, equipment goes missing, and a late-night intruder breaks into her lab and steals the samples she's collected. She realizes that someone doesn't want her to complete her study, but Alex is not easily deterred.