one line is “you have to keep this pillow on your face”

You arrive at a secret location at a precise time, prompted by a mysterious email. You must follow the instructions closely. Once inside, disturbing visions begin. Unspeakable acts befall you—often frightening, sometimes sensual, possibly painful—each stimulating your deepest fears. And when it's over, you are changed, abandoned, and left wondering what is real and what was merely a game.