Nightbreed

Clive Barker directs this fantasy horror starring Craig Sheffer and David Cronenberg.

Aaron Boone (Sheffer) is a young man who has visions of gory murders.

He visits psychotherapist Dr. Phillip Decker (Cronenberg) who convinces him he's a serial killer.

Decker has Boone arrested for the murders but the latter escapes custody and makes his way to a mythical Canadian necropolis called Midian, occupied by the shapeshifting Nightbreed.

His girlfriend follows, pursued by Decker who is, in fact, the killer of Boone's visions...