Unfortunately, with the exception of Jonah, the rest of the characters aren't much more fleshed-out than the screeching beasties.

The road to the finale is littered with dead bodies and red herrings, but Open Grave is more notable for its laid-back approach to storytelling than for its plot twists. That's a kind way of saying it's sort of boring.

Individual moments linger, but Gonzalo López-Gallego's film is merely a rough draft of a thriller.

The real problem with Open Grave is that screenwriters Eddie and Chris Borey have no game plan for getting from their mysterious premise to their big reveal, which isn’t all that shocking or unexpected anyway.

The screenplay by Eddie and Chris Borey fails to live up to the juiciness of the original premise, lacking meaningful character development and teasing out its unveiling of its mysterious plot elements in dull, plodding fashion.