Bootham is currently being used by underground doctors who take people hostage and test their medical knowledge on them. Next up is surgery on you, so you need to get out of there quickly if you want to stay alive.
You have to figure out how to get out of the creepy asylum from the 19th century where you woke up. Something bad is going to happen in 900 seconds.
You will have to find codes to open doors that you need to, while ghosts from years ago will try to keep you from leaving. There will be a lot of pressure on you to find the codes quickly, before your flashlight and battery die.
Batteries and other interactive items are hidden all over the map. Finding batteries will extend the life of your flashlight's batteries, giving you more time to look for what you need. It's not that simple, though.
Have fun and good luck!