Six people bound together by a traumatic experience decide to round off a year of group therapy in style. They join each other once more, traveling up to the Scottish Lowlands for a reunion weekend in a 1970s holiday let. Soon a number of mysterious and horrifying events start to expose the cracks in their relationships, and one by one they discover that trust runs but skin-deep. A night of closure turns out to be far more final than they could have anticipated.
Site 13 is a psychological horror film in the vein of HP Lovecraft. It is the story of a man who awakens from a 10 year catatonic state in a mental institution. What happened? How did he get there? And what horrible thing from his past is coming for him?