Shortly after World War I, a troubled man accepts a solitary assignment as a “weather official” on a tiny, remote island on the edges of the Antarctic. When he arrives, the predecessor he is meant to replace is missing and a deeply disturbed stranger is barricaded in a heavily fortified lighthouse. At first adversaries, the two find that their tenuous partnership may be the only way they survive the unspeakably horrific reptilian creatures that ravage the island at night, attacking the lighthouse in their organized effort to find warm-blooded food. Armed with a battery of ammunition and explosives, the weather official and his new ally must confront their increasingly murderous mentality, and, when the possibility of a kind of truce presents itself, decide what kind of island they will inhabit.
