As the lone U.S. Marshal in Antarctica, Carrie Stetko prepares to depart the frigid landscape as the sun sets in three days, signaling the closure of the Amundsen-Scott Research Station for winter. However, when a body is found in the ice, Carrie is drawn into a chilling investigation, uncovering the continent’s first murder. As she delves deeper into the case, she realizes that solving this mystery could come at a perilous cost to her own life, forcing her to confront both the elements and a ruthless killer.