NOTE: THE CACHE IS NOT AT THE POSTED COORDINATES!
Primer is a 2004 American independent science fiction drama film about the accidental discovery of time travel. The film was written, directed, produced, edited and scored by Shane Carruth, who also stars in the main role.
Primer is of note for its extremely low budget, experimental plot structure, philosophical implications, and complex technical dialogue, which Carruth, a college graduate with a degree in mathematics and a former engineer, chose not to simplify for the sake of the audience.
The diagram of the technology which enables time travel is shown below. Use it wisely.