I have to admit that what drew me most to Gehenna: Where Death Lives was the appearance of Doug Jones (most recently seen in the Oscar winner The Shape Of Water) in the movie. I suspected it might be just a cameo but it was enough to at least get me interested.
We start with a group of investors head up by Lance Henriksen, in a short cameo via phone call, who are looking for the perfect spot for a new resort. When they seemingly find this, they also find a hidden Japanese bunker from World War 2, which they decide to explore. This is a horror movie, so obviously exploring an abandoned war