The Man in the Fields is an ancient ritual that rewards the player with wealth and safety. During the ritual every door and item that can be opened in the player’s house will be open. The player must close everything before midnight to prevent The Man in the Fields from getting in. Even if there is the smallest box left open, it will be able to get in and take away something you can’t get ahead without.
During the ritual you may or may not encounter a shadowy man in your house. He is not The Man in the Fields, he is a herald.
But heed this warning:
DO NOT LOOK INTO THE FIELDS! If you do, you will see a man with elongated limbs starting to move towards your house. You must lock yourself in a safe room with a crucifix, before it finds a way in.