The Cutting Room (2015) online

College students Raz, Charlie and Jess are about to start work on their end of year Media Studies project... unaware of a malevolent force lurking deep below their sleepy town. A recent wave of apparent Cyberbullying and the disappearance of two local girls lead the group to an abandoned army barracks situated deep in the forests that surround the college. What they find there is a terrifying labyrinth of tunnels from which there seems no escape... and a dark figure hell bent on tormenting them. Hunted, frightened and lost, Raz, Charlie and Jess must now escape the barracks or suffer the unspeakable fate that awaits them.