The movie started really great, with two brothers uncovering mysterious unexplored cave with something sinister lurking in the deeps.
For a good part of the movie it was not clear what it is or if its even real or only the imagination of the protagonists.
Unfortunately at the end story reveals that the dark mystery is only a ghoulish human like creatures living in the forgotten cave.
There is always a problem with movies like this - show too little or too much.
In this case I personally would prefer if story left more to the imagination.
The acting and camera work was decent but the entire movie is quite forgettable.
As some said - wasted potential.