MULDER'S DESPERATE SEARCH FOR HIS SISTER TAKES ON NEW URGENCY AS HE CHASES THE ONE MAN WHO MAY KNOW HER WHEREABOUTS INTO THE ARCTIC WASTES. SCULLY ENLISTS SKINNER'S AID TO FIND HIM.
Mulder faces an excruciating choice when he is forced to ransom his partner by turning over the woman he believes is his sister to the alien assassin. Guilt-ridden, he must answer to his father for losing his sister yet again, bringing more grief upon his family. But his further search turns up a surprising secret about "Samantha," leading him on a quest that takes him literally to the ends of the earth. Scully must enlist the aid of Assistant Director Skinner to rescue him before the alien assassin kills him. In the frozen desert of the Arctic ice shield, Mulder finally gets an answer about his sister -- even though the asking price is his life.