一次到南极洲的科学考察发现了不同寻常的植物标本。当标本运出进行进一步研究时,这些植物被意外地引入了南海海军基地中,很快暴露出它们是致命的、夜间分泌酸性的杀人武器......Operation Deep Freeze, a scientific expedition to Antarctica discovers unusual tree specimens. When specimens are shipped out for further study, the trees are accidentally introduced to a south seas Navy base, soon revealing themselves to be killer, acid-secreting monsters that live by night.