Erotic Mystic.

Desperate to cure his sudden impotence, Fred begins a secret affair with Melva, a seductive disco singer who seems to be the only remedy for his condition. However, as Fred regains his virility, his wife Sonia becomes the target of terrifying supernatural disturbances. Ignoring warnings from an old friend about a dark presence, Fred unknowingly walks into a deadly black magic trap, unaware that Melva's seduction hides a sinister vendetta from the past.