Amateur occultist Marcus J. Trillbury, aka Onyx the Fortuitous, is struggling at home and work, but his dreams seem to be answered when he lands a coveted invitation to the mansion of his idol Bartok the Great for a ritual to raise the spirit of an ancient demon. As Onyx and a fellow group of devotees join Bartok to prepare for the ceremony, the getaway of his dreams soon takes a nightmarish turn and Onyx must decide what he’s willing to truly sacrifice in order to meet his destiny.