A group of students from single-sex private schools, spend a night patrolling the eerie grounds of the historic Dhoultham School as part of an initiative with the British Army to provide rich kids with basic military training. 

As each hour passes the teenagers witness a series of increasingly disturbing, ghostly occurrences. Personal conflicts are magnified and details of the school’s horrific secrets bubble to the surface. The ante is upped by two thieves who have chosen the night to conduct a heist on the school Archive: a vault of priceless historical documents. As the supernatural encounters begin to take a malevolent turn, the students realise they must escape Dhoultham before the night’s end. The only problem is they have all been separated; trapped in a labyrinth of ghosts, pistol-packing madmen and a deeper, darker evil.