January1959,SovietUnion.IntheicyUralMountains,agroupofninestudentssetsoutonaskitrek.Eventhoughtheyallarewell-experiencedhikers,theyneverreachtheirdestination.Astheirbodiesturnupamonthlater,itleaveslocalinvestigatorspuzzled.Theirtentwascutopenfromtheinside,theyarefoundfrozenstiffintheirunderwearspreadaroundthecamp,...