Walter, a retired school teacher, is troubled by a recurring dream involving a bloody satanic ritual. He is invited to a museum featuring a collection of ancient artworks. Strange occurrences at the museum send he and his friends looking for a rational explanation. Their search leads them to India, where they are forced to partake in the very ritual he had dreamed about.

Father Grayson becomes involved in the effort to exorcise the evil that has taken up residence in his friends' midst.