In the summer of 1983, just days before the birth of his first son, writer and theologian John Hull went blind. In order to make sense of the upheaval in his life, he began keeping a diary on audio cassette.

A biker gang visits a monastery where they encounter black-robed monks engaged in worshipping Satan. When the monks try to persuade one of the female bikers, Helen, to become a satanic sacrifice the bikers smash up the monastery and leave. The monks have the last laugh, though, as Helen, as a result of the satanic rituals, is now possessed and at night changes into a werewolf, with dire results for the biker gang.