Sixpeopleboundtogetherbyatraumaticexperiencedecidetoroundoffayearofgrouptherapyinstyle.Theyjoineachotheroncemore\,travelinguptotheScottishLowlandsforareunionweekendina1970sholidaylet.Soonanumberofmysteriousandhorrifyingeventsstarttoexposethecracksintheirrelationships\,andonebyonetheydiscoverthattrustrunsbutskin-deep.Anightofclosureturnsouttobefarmorefinalthantheycouldhaveanticipated.