Agent FBI Frank LaCrosse je na lovu za psihopatskim in zelo inteligentnim serijskim morilcem. Medtem pretkani morilec spremlja vsak Frankov korak. Da bi ga še bolj spravil ob živce, ugrabi njegovega sina. Frank je zdaj še toliko bolj odločen, da mora morilca za vsako ceno izslediti. Ko se odpravi po njegovih poteh, ga sledi pripeljejo v Kolorado, kjer se ljudje spopadajo s hudo zimo. Tam Frank spozna šerifa Bucka Olmsteada, ki postane njegov edini zaveznik. Pot mu prekrižata tudi temnopolti Bob in mlad štopar Lane Dixon. Je kdo od njiju morilec, ki ga išče Frank? Se je Frank ujel v past?
F.B.I. agent Frank LaCrosse returns home to find his home has been broken into, his son is missing and Missy the babysitter is lying in a pool of her own insides. Her murder being the hallmarks of a elusive enigmatic serial killer whose slaughter spree...stretches nearly two years. Frank's desperate pursuit leads to Amarillo, Texas, where two more victims matching the killers M.O. have been found slashed to death. As Frank searches for his suspect the local Sheriff Buck Olmstead and his Deputy Nate Booker investigate the killings in-between a heated election feud, with his competition police chief Jack McGinnis. All the while drifting former doctor Lane Dixon is picked up by ex-railroad man, Bob Goodall. As a local Mechanic, Clyde 'Shorty' Callahan becomes the latest victim. Frank hopes and prays to find this sociopath before he disappears perhaps forever into the rocky mountains