Duffy and his aunt and two cousins, Andrew and Maria, decided to go camping. The two families arrived to the house, and began renovating. Andrew found a strange note on the wall.
Beware the Sentinel
The families decide to go for a walk. It gets warm out, and they take off their coats. Duffy forgot his, and Andrew could swear he hears noises behind him.
The two single mothers went into town to buy supplies, leaving the teen boys and young girl home in the cabin, alone. The kids hear scratching at the door, so they check to see what it was.
The kids looked outside and saw a large creature standing at the door. They desperately looked for somewhere to hide, eventually ending up inside the house, in a bedroom upstairs.
They listened from the bedroom as the creature knocked down the door, stomped up the stairs, and stopped in front of the door.
The creature, the tips of its ears scraping the ceiling and fangs reflecting the moonlight, opened the door slowly, making it creak loudly. It entered the room, sniffed the air, and threw Duffy's jacket at him, saying, "You forgot your jacket, stupid." Duffy still hasn't forgotten a single thing to this day.