The debut feature from filmmaker Shane Carruth -- who wrote, directed, photographed, edited, scored, and stars -- Primer is a psychological sci-fi thriller about a group of four tech entrepreneurs. Toiling away in a garage, the quartet had successfully created error-checking systems for their clients. But their recent work seems to have created an unexpected and seemingly impossible side-effect. Suddenly, two members of the group realise they are in possession of a device that can double, or perhaps even quadruple, the space-time continuum of anything that enters it. What at first seems like a windfall of astronomical proportions eventually proves to be much more than they bargained for, as the duo attempt to manipulate time to their financial -- and emotional -- benefit. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.