Starting a new school is never easy, especially when it's one plagued by rumours of violent murders and vengeful spirits. Forget the sweats brought on by surprise maths tests: the horrors roaming the halls of Yeondoo High School can outright kill you.

Unfortunately, when a good deed for a fellow student goes wrong you're locked in with them all overnight. With not even a pointy pencil to hide behind you've got to carefully creep through the dark corridors and lecture halls in a psychological first-person frightfest brimming with supernatural terrors, hidden secrets and classic survival horror genre puzzles. All the while, a killer janitor stalks your every move as you make a frantic bid for freedom.

Can you keep your nerve and mastermind a way out of the nightmare? Or will your name be scratched off the next morning's roll call sheet and added to the growing list of victims the building has claimed?