A small group of strangers board an airplane for a routine commercial flight.

One passenger is architect O'Neill (Thinnes) who just happens to be transporting an ancient abbey in the plane's cargo hold.

Turns out a vengeful Druid spirit is encased within the altar's cornerstone...and it's chosen 37,000 feet as its resurrection place.

Soon, the aircraft is trapped in a mysterious holding pattern and losing fuel...for it seems the powerful Druid forces won't stop until they receive a human sacrifice!

Sound bizarre? It is. But it's also strangely watchable, thanks to a diverse cast each of whom seems to be doin' their own thing.

Where else can you get Connors as a no-nonsense pilot, Shatner as an ex-priest and Grimes as a dog-loving witch?

Best scene: the surreal climax with Shatner falling through the breaking dawn...oddly memorable.

If only the crew had thought of sacrificing the little girl instead of her plastic doll. Now that woulda been fun!