|| Following in her absentee father's footsteps in a law enforcement career, U.S. Marshal Mercy Brennan has just recovered from being shot in the line of duty. And, unbeknownst to her, her father's recent reappearance in her life has put her in the sights of St. Louis's most powerful gang. Her boss assigns Deputy U.S. Marshal Mark St. Laurent--Mercy's ex-boyfriend--to get her out of town until her safety can be guaranteed. Unaware of the extent her boss and Mark have been keeping her in the dark, it isn't until a freak ice storm strands them at a remote location and out of contact with the district office that the full severity of their situation becomes clear. As the storm worsens, the forces of nature combine with a deadly enemy to put them in great danger. Can they survive long enough for help to arrive--if help is even coming at all?