Jim Bannon and Barton Yarborough are Jack and Doc, detectives: this particular case has them encountering a man with a peg leg, a woman mysteriously confined to a wheelchair, a Russian psychiatrist who apparently does not speak that language, and a man named Monk (George Macready) who is certain he is going to be decapitated within a matter of days. Told mainly in flashback, the story shows Jack and Doc unfolding the mystery and gradually discovering that not all of these characters are what they seem. Indeed—are any of them?
Macready is excellent as the bizarrely-behaving threatened man who is either rattled or drugged or just unbalanced. Nina Foch is excellent as his wife—from her first appearance there is little doubt that there is more going on behind that face than she is letting on. Bannon is steady if unspectacular as the lead detective, essentially a no-nonsense straight man looking for logical answers. Yarborough's southern drawl as Doc is, I take it, meant to indicate his status as slightly comical sidekick; he says things like, "Hey, you mean all that stuff about the prophecy is just so much razzle dazzle?" but for the most part he stays out of the way.
Overall, an inventive story and solid direction combine to produce a sinister atmosphere in which tension stays high and the viewer is kept guessing. Straightforward performances add weight to this excellently dark mystery.