An enormous alien spacecraft glides swiftly toward earth from the depths of space. It descends quietly into an alley behind a movie theatre in a tiny desert town called Dead Rock. In the theatre, there's a knock at the projection booth door. When it's opened, a tall, insect-like creature is standing there and hands the projectionist a film can. The can is opened and a dazzling blaze of eerie green light, the projectionist is vaporized. The alien then steps up to the projector and with incredible speed, threads the machine as if he had been doing it all his life, faster and faster he works, splicing together the most incredible montage of science fiction film clips ever displayed at one time, as other aliens try to take over the theatre. It's up to ten-year-olds and some of their friends to save the day and rid their town of the creatures - if they can only pull themselves away from the screen. In clip after clip, everyone's favourite monsters destroy the world in spectacle after spectacle.