Duffy, Andrew, his sister Marie, and their mothers, are taking a short vacation to the woods to stay in an old cabin. Duffy is very forgetful, and he leaves things everywhere! The old cabin is creepy and eerie, and Andrew doesn't want to stay in the old, huge, house.
BEWARE THE SENTINEL
While cleaning, Andrew finds BEWARE THE SENTINEL, scribbled across the walls. He tells his family, but he feels weird about the whole situation.
Andrew, Duffy, and Marie run and hide in the house. They hear the huge man-like creature coming up the stairs towards them, then it swung open the door! The creature spoke to them, "You forgot your jacket, stupid" it said. Overall, the creature, also known as the Sentinel, was not trying to hurt the kids, just giving Duffy's jacket back.
Andrew, Duffy, and Marie take a walk in the woods. It is a hot day, and Duffy takes his jacket off. Being Duffy, he forgets it in the woods.
Andrew, Duffy, and Marie are watching T.V. in the house, when they hear a scratching sound at the door. This frightens them, and Andrew looks out the window to see what's going on. He sees a huge monster! They all run away to hide.
Andrew, Duffy, and Marie hide in a barn by the house. They hear a large creature breaking down the houses doors, and Andrew realizes how the creature had been following them. It was Duffy's jacket!