A documentary filmmaker turns his lens on an enigmatic conspiracy theorist who claims he's found the entrance to a vast underground city populated entirely by monsters.
Digging up the Marrow is a 2014 American horror comedy film written and directed by Adam Green. It stars Green as a fictionalized version of himself who, in the process of making a documentary about monsters, is contacted by a man, played by Ray Wise, who insists that he can prove monsters are real.