Ghost Sanatorium

Your group is involved in investigating those places where ghosts and some otherworldly forces might really dwell. The next expedition leads you to a suspicious sanatorium on the outskirts of a provincial town. It's in this sanatorium where people disappear from time to time, and the locals have reported suspicious lights and freely hovering silhouettes above the ground dozens of times. That's why you are going to obtain evidence of the truth of supernatural activity in order to tell the whole world about it. But will you be able to do this, as ghosts do not come into our world for no reason. In the pursuit of genuine evidence, you don't even notice that you are putting yourself in serious danger...