Shudder has debuted the trailer for supernatural nightmare, PARASOMNIA.

PARASOMNIA follows Riley, a young woman tormented by night terrors and a past of unresolved tragedy. When her best friend is the latest to go missing, she begins to suspect the demonic figure lurking in her sleep has crossed over into the real world.

PARASOMNIA is written and directed by James Ross II.

The film’s cast includes Jasmine Mathews, RJ Brown, Sally Stewart, Stephen Barrington, Danny Brown and Simon Longnight.

Streaming on Shudder September 4.