A UFO Over My Bed (2011)

In a dystopian future Buenos Aires, humans and aliens coexist. The totalitarian government persecutes the aliens and oppresses the people watching their every move. Rex is a cartographer who decides to work as a spy for the government because he is in dire need of a job. But everything changes when he meets Ian, a fugitive alien he becomes attracted to. In the sewers of the city, the revolution is beginning.