A U.S. marshal (Kate Beckinsale), the only one assigned to Antarctica, must investigate a murder there within three days before the Antarctic winter begins. She crosses paths with a U.N. operative (Gabriel Macht), also investigating the murder.She must chase down suspects and find more murders. Early in the story, Steko is attacked by the killer and left for dead in a storm. She saves herself but loses two fingers due to severe cold-related injuries.