You are in purgatory. All you know is that you need to get out, and fast. You try and find your way out, stumbling everywhere as you try to carry on, and you find a key. Upon finding the key, you realize all you need to do is find the rest, and you will be able to leave, finally. However, you soon realize... that it isn't as easy as it may seem.
So, you've collected four keys... congratulations. Only six to go!