You will arrive in a field. The field is empty. There is a barnhouse by the field. There are four bales of hay in the barnhouse. Move the bales into the field and arrange them in to a line directly down the middle of the field. When the sun is at its highest point, the shadows of the bales will converge.
Find the shovel in the barnhouse. Dig where the shadows meet. There is the body of a man buried thinly in the soil. Extract his silver tooth, and take an envelope from his left jacket pocket.
This is the ritual.