After you wake up in what seems to be an abandoned 19 Century asylum you have the task to escape. While trying to find codes for necessary doors, supernatural creatures from years before will try to prevent you from leaving. A torch and battery system means you're under pressure to find the codes quickly as your torch will stop working.
Interactive objects like batteries are hidden around the map. Finding battery's will restore your torch battery life which gives you longer to look for required items. But it's not all that easy.
Bootham is currently been used by underground surgeons who kidnap and experiment on the human body. You're the next person to be operated on and you have to move quickly if you want to leave alive.