When the Earth passes through the tail of a comet one December evening, most of the world’s population is turned into either a pile of dust or a vicious zombie. The only survivors are those who happen to be shielded by steel. Among those saved are teenage movie theater usher Reggie (Stewart) and her valley girl sister Sam (Maroney). Together they set out to try and find some safety in the post-apocalyptic landscape. A super-fun sci-fi comedy that also serves as a time capsule of ‘80s culture.