Prime Evil (1989)

Prime Evil (1989) 

In 1349 a group of monks led by Brother Seaton denounce God for 

bringing the black death on to them and pledge allegiance to 

Satan. The pact comes with a price as the monks must sacrifice 

a blood relative every 13 years in order to remain immortal. 

Flash forward to modern day New England where the monks are 

alive and well and will apparently accept anyone into the fold 

including homicidal janitors. George Parkman's 13 year duty 

has arrived and promises to sacrifice his granddaughter 

Alexandra who was sold into child pornography by her father 

when she was six years old. ....  A side plot is thrown into 

the first fifteen minutes as a nun Angela volunteers to go 

undercover in order to expose the evil order. Her initiation 

consists of smashing ceramics and a change of wardrobe. Voila! 

Instant satanist! She doesn't factor in the movie again until 

the end. Alexandra soon becomes smitten with Father Seaton much 

to the consternation of her boyfriend Bill. When every person 

Alexandra has ever known mysteriously die her date with the 

devil arrives. (IMDB  Zeegrade)