Hugh Rincon and Sara Lange are Alaska natives who, despite being married, have careers that keep them apart: Sara is executive officer on a Coast Guard cutter in Alaskan waters; Hugh gathers information for the CIA, a continent away. When Hugh's discovery of a terrorist plot to drop a dirty bomb on an Alaskan city isn't taken seriously by his own agency, he realizes that it's up to him to save his wife and protect the people in a place he still holds dear.