The whole plot revolves around the woods (and a Red House in the woods) that the farmer (Pete) forbids the kids (Nath & Meg) from exploring. He speaks of the woods as dangerous, even as evil. He talks of screams in the night.
Well, I don't want to reveal more of the plot to those of you who haven't seen the movie. Suffice it to say, the movie is about unresolved guilt. And unresolved guilt works on the mind and the soul, eats away at it, and if it remains unresolved, it will destroy the person.
Resolving requires acknowledging the truth of one's guiltiness, and seeking forgiveness, and where possible, making reparation. Ultimately, if there is no resolution, the destruction will follow us into eternity, where the destruction will be permanent (hell.)
So, let us make sincere, regular and faithful use of the sacrament of conscience resolution, confession.
By the way, my review of the movie is 5 stars. I enjoyed it a lot, it held my attention, it was thought provoking. The acting was good, the cinematic values were good. I would definitely recommend it. Check it out.