This film is fine and has a strong and commanding lead role by Andre Morell. It's a good story, is well put together, and interestingly is set in 1860 in darkest Cornwall (and not as you would perhaps expect in the Caribbean, or Haiti in particular).
Sir James Forbes, an eminent professor of medicine at London University, receives a troublesome letter from one of his former protege students and decides, along with his pretty daughter, Sylvia, to visit him.
In the Cornish village, 13 people have died within a year and all under mysterious circumstances. Suspiciously, the local squire will not authorise any autopsies. The doctors decide to investigate and in doing so uncover empty coffins, voodoo practice, strange going-ons at a disused tin mine and, ultimately, as the title suggests, a plague of zombies.
Diane Clare plays the role of the voluptuous Victorian beauty and overall this is a decent 86 minute offering from the Hammer team.
The dream scene is particularly memorable and is a famous slice of 60's horror (remember that this film was actually made before 'Night of the Living Dead').
It is ironic that the human psyche naturally fears the idea of zombies but, at the same time, a belief in life after death is a basic tenet of most world religions.