Underworld's Kate Beckinsale plays a U.S. Marshal based at an Antarctic research station, where the continent's first-ever murder triggers a shocking mystery she must race to solve before being stranded with six months of winter darkness -- and a killer -- closing in. Dominic Sena (Swordfish) directs a talented cast including Gabriel Macht, Tom Skerritt and Alex O'Loughlin in Dark Castle Entertainment's action-packed thriller.