In a story that looks very terrifying. The story tells about three American tourists who decided to try a new experiment by following a mysterious map in the depths of Japan's forests looking for an ancient temple in a remote area. Things are quite different. When the spirits get used to them, their adventure becomes a terrible nightmare, which may make them think of escaping from a painful reality.
Problems aside, it's refreshing to stumble on a film of this genre that doesn't fall under the "standard order horror" umbrella where an avalanche of jump scares replaces attempts to generate a pervasive sense of unease.