Seven friends gather together to film an amateur horror movie in a dilapidated country mansion. Though outwardly they appear to be prepared for the world, each of them arrives at the remote house in chaotic inner turmoil. Throughout the weekend, the group films a darkly comical Celtic fantasy, but some members suspect others of feeding intimate details from their true lives into the film's script, blurring the line between what is real and what is fiction. That line is irrevocably intensified when Lance foists an idea upon the group: they will all drop acid together, as a rite intended to form a tighter bond. But instead of bringing the group closer, the change in consciousness unleashes a torrent of uncensored expression that permeates the atmosphere. As the night wears on, Neil, Lionel and Lance go for a drive. The uncertain story of what happened during that outing will cause the group to face a most terrifying morning as they question just what went wrong and why.