The film is about the coal miners who face a real disaster in their lives together. Now, they seem to be trapped 600 feet below the surface of the Earth after a catastrophic crash that is really changing course. Everything descends into madness and begins to turn on a dangerous path between all.
The title doesn't just refer to what lurks in the lake's still water. It's a guide to where Beneath's substance lies, the acid heart inside its plastic chest.
Whatever tension the pic manages to build ... is mostly undercut by the recurring appearance of the fish and by the generally overemphatic performances of the human cast ...