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.

In 1863, Amsterdam Vallon returns to the Five Points of America to seek vengeance against the psychotic gangland kingpin, Bill the Butcher, who murdered his father years earlier. With an eager pickpocket by his side and a whole new army, Vallon fights his way to seek vengeance on the Butcher and restore peace in the area.