In the ruins of a haunted medieval abbey, four musicians hope to tap into the site's dark history—an experience that almost destroys them

Thirteen years ago on a cold December night, a rock band called The Philosophers Stone gathered in the ancient ruins of an abbey to record their new album.The evening ended in bloodshed and death. Now, the tapes from that fateful recording session have been released as The Black Album, and the scattered members of the band know it's time for a reunion. Time to return to that dark December night—for one final performance.