You were a bounty hunter who was chasing a bounty worth millions. It was a demon. You used a net on it made with holy water to trap it. You dragged it back and waited till morning for the people to come and pick it up but when you showed the person in, she was gone. The person gives you another week until they give it to someone else and you won't get the money. Meanwhile the demon had turned into a mouse and was hiding in the walls.