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.六个因创伤经历而联系在一起的人决定以时尚的方式结束一年的集体治疗。他们再次相聚,在20世纪70年代的度假屋中前往苏格兰低地共度团聚周末。很快,一系列神秘而恐怖的事件开始暴露出他们关系中的裂痕,他们一个接一个地发现,信任是根深蒂固的。结果证明,一个关闭的夜晚比他们预期的要最终得多。