The succubus, Kia (Allyson Ames), is tired of claiming corrupt souls for the God of Darkness. Going against the advice of her peer, Amael (Hardt), Kia decides to pursue a pure soul. She stumbles onto war veteran Marc (William Shatner) and his sister, Arndis (Ann Atmar), living in a cabin. Kia's attempts to seduce Marc and works just fine until he takes her to a church so that they can become man and wife. This nearly kills Kia and is considered a great offence by those of the underworld. To save Kia, Amael summons the incubus (Milos Milos) to come and set the events in motion that will cause Marc to succumb to temptation and forfeit his soul for the God of Darkness.

This black and white anomaly directed by Leslie Stevens is a real treat. The dreamlike atmosphere is laid on heavily with impressive lighting, stark camerawork, and liberal use of smoke machines. The plot plays out like a fable and brings folklore into the foreground instead of just referring to it like many films so often do.

The cast is up to the challenge of bringing this simple yet eccentric story to life. William Shatner caught me off guard completely. His performance as Marc is actually subtle and when his emotions finally burst forth, they're not overdone. Allyson Ames' Kia is a great character, torn between proving her worth to her master and seeking her redemption.

Milos Milos is just plain loony as the scheming incubus who also happens to look a little like a young Pete Townsend. Ann Atmar puts in one hell of a performance of the ill-fated Arndis and it a shame that she committed suicide shortly after the movie was released. Aside from her beauty, Atmar has an incredible screen presence and could have gone on to do just about anything.

Fans of 60s horror flicks shouldn't be put off by the Esperanto gimmick. This is easily one of the better horror flicks to come out of the era. The scene where the incubus is summoned is way ahead of its time and like many of the other intense moments, it is quite memorable. I can't recommend this to every horror fan, but if you're in the mood for a quirky black and white flick with atmosphere so thick you couldn't cut it with a goat antler, give Incubus a shot.