EXIT: The Cemetery Of The Knight | Setup & Intro (No Spoilers)

About EXIT: The Game – The Cemetery of the Knight, from BoardGameGeek:

According to legend, tonight's moon is at the right angle to find a priceless red ruby hidden in the tomb of Sir Reginald Wreston. No one has succeeded in finding it yet. Will you triumph tonight? Exit: The Game - The Cemetery of the Knight is a puzzle game modeled after escape rooms, and it includes components meant to be folded, written upon, or torn, so it's marketed as a single-use game.