Six private school students spend a night patrolling the eerie grounds of the historic Dhoultham School as part of a British Army initiative to provide rich kids with basic military training. As each hour passes they witness a series of increasingly disturbing occurrences, slamming doors, self-governing lights and ghostly apparitions. 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ante is upped by two thieves who have chosen the night to conduct a heist on the school Archive: a vault of priceless historical documents.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 an increasingly malevolent turn, the students realise they must escape Dhoultham before the night's end.

In this searing Southern drama, a mother and son reunite under desperate circumstances years after a family tragedy drove them far apart.