Devil's Beacon.

Martín, a young urban raver, is involved in a strange accident on the road on his way to a party in the middle of the Argentine Pampas. Finding refuge in a mysterious country grocery store and sheltered by two strange locals, Martín's paranoia begins to take over him. As the hours progress, his perception begins to distort, unleashing disturbing visions that will lead him to confront the supernatural forces that hide in the night.