Halloween Mystery

That Halloween night, you will remember for a lifetime. Evening came, and you were going to go with friends to a nightclub, where will masquerade party. You have made them a scary costume, and went to the meeting place. Suddenly, the whole street was covered with mist, and when it cleared, then you see that this is a very different place. You were in a parallel reality, which is very scary, but in order to get out, you need to find the key.