I thought this was shaping up to be a standard "They're playing with his mind to drive him crazy" type of story. When it turned out that a genuine supernatural event had occured I was a little disappointed because I wanted to hear all the details about how the two lovers arranged things to make the man come unhinged.
It reminded me a little of Macbeth, where we are left wondering if Macbeth was the victim of a self-fulfilling prophecy. But since that isn't the case here the only real mystery is who the heck that guy in the cemetery was.
All-in-all a good listen, but nothing really new or intruiging here, so I give it a C. 